Facebook primarily competes with Google (GOOG), Yahoo! (YHOO), Microsoft (MSFT) and Aol (AOL) in the display and search advertising markets. Here we highlight three major revenue streams that contribute to Facebook's value.

We currently peg Facebook's intrinsic value at $45.1 billion.

Target Corp. (TGT) is one of the top ten largest retailers in the U.S. by sales, competing mainly with Walmart (WMT), Best Buy (BBY), Macy's (M), Sears (SHLD) and Costco (COST). The recent economic environment has revealed that the firm is highly exposed to U.S. macro-economic trends that impact retail spending, such as high rising energy prices, lower home values and downturns in the economy. Although Target positions itself as a "cheap chic" retailer, consumers are still cutting back on goods such as apparel and electronics, both of which play an important role in Target's total sales.

Facebook primarily makes money through online advertising, both display and search advertising, in which it competes with Google (GOOG), Yahoo! (YHOO), Microsoft (MSFT) and Aol (AOL). However, it has started to tap other business lines as well, like distribution of virtual goods in games and applications.

Time Warner Offering Movies on Facebook Fan Page

Time Warner (TWX) recently announced that it will start offering movies for purchase or rental through Warner Brothers Entertainment's Facebook fan page, making it the first studio to do so. The users will make the purchase with Facebook Credits, a virtual currency. This is no doubt a good move by Time Warner as it gives the company a platform to tap the increasing base of users looking to consume traditional media entertainment online.

The past few years have been brutal for small businesses but it looks like things are starting to improve. A report from the National Federation of Independent Business shows that confidence is at a three-year high. There are even more plans to hire employees.

Well, top companies and investors are seeing opportunity. For example, Google (GOOG) Ventures, Salesforce.com (CRM) and Sequoia Capital have announced a $32 million round for HubSpot.

Kraft Foods (KFT) has done well to sustain demand in the face of higher coffee prices brought on by rising commodity prices. Kraft is the world's second largest food and beverage company after competitor Nestlé. It also competes with PepsiCo (PEP), General Mills (GIS) and Kellogg (K).

Kraft manufactures both food and beverages, with beverages accounting for nearly 14% of our $32.58 price estimate for Kraft's stock, which reflects a small premium to market price. Chocolate, candy and gum constitute around 31% of our price estimate, with snacks adding 19% and grocery products representing another 14%.

The mobile revolution is spawning a variety of business relationships to attract new customers. The latest is the partnership between credit card holder, American Express (AXP) and the social network Foursquare Labs Inc.

Both companies are capitalizing the growing segment of online purchasing. American Express had roughly $100 billion in online transactions last year. Online spending is growing at a 20% rate, compared to15% for overall spending, as reported in the Wall Street Journal.

The first Chinese hybrid car, the F3DM, will hit U.S. showrooms next year from BYD Co. Ltd. (BYD). BYD, which stands for Build Your Dream, sold 240,000 F3DMs last year and Warren Buffet likes the company so much that Berkshire Hathaway invested $230 million in BYD in 2008. In fact, the latest BYD model will be on display at Berkshire's big meeting in May, as reported in New York Times.

BYD is a diversified energy company. In addition to its hybrid models Its products include solar panels, solar shaded parking systems, home energy storage systems and charging equipment and LED lighting. BYD plans to open showrooms in the Los Angeles area.

Shares of food giant Campbell Soup Co. (CPB) traded sharply lower Friday morning after it posted lower-than-expected revenues and lowered forward guidance.

Earnings for the company's second quarter were in-line with analyst estimates at $0.71 per share, but revenues came in at just $2.13 billion for the quarter. Analysts had been expecting to see Campbell report revenues of $2.15 billion.

The earnings season has been going pretty good so far, and Walt Disney (DIS) will get its chance to impress Wall Street this afternoon when it reports its fiscal first quarter results after the market closes.

Going into this afternoon's report, analysts are expecting to see the company report earnings of $0.56 per share, up from $0.47 during the same period last year.

Teams have been preparing their game plans and it's time to see which of the 60 teams will win. No, not the Packers or Steelers -- Go Pack! -- but PepsiCo (PEP), Anheuser-Busch (BUD), General Motors (GM) and all the other companies competing for the best spots in one of TV's most expensive marketing moments, costing an estimated $3 million dollars per 30 second spot.

For those not into football, the ads in the Super Bowl game can be more amusing than the game itself as advertising teams compete for attention, show their best efforts and even get rated by numerous online sites. Last year, Doritos (owned by PepsiCo), and E-Trade (ETFC) did well, and Anheuser-Busch seems to always have a Clydesdale horse in the running.

One of these days, Facebook is likely to go public. But how much could its shares be worth in an initial public offering? The numbers are all over the place. From Bloomberg's estimate late last year that it was worth $25 billion to Fortune's estimate last August of $50 billion. Now, there is another report from a financial research firm, Trefis, that pegs the value at $45 billion today -- but potentially as much as $125 billion, if a few things go right.

One of the things that could go right, is coming up a with a new way to generate revenue -- and Facebook says it has a plan. It's called "sponsored stories." The company plans to pull content out of members' status updates for use in advertisements that will appear in their friends' Facebook pages.

Apple Inc. (AAPL) has had tremendous success with its App store, and it is once again approaching a major milestone as the company's stock continues to soar and set yet another 52-week high today.

Apple stock closed the day at its new 52-week high of $348.48, up 0.8% on the day.

As everyone knows by now, the Apple (AAPL) iPhone is headed for Verizon's (VZ) reportedly more reliable network. With so much excitement over the announcement, traders and investors can look at various ways to profit off of this.

The obvious beneficiary is Apple, but there are additional ways to play it, such as the advertising companies, as Verizon hits the airwaves to promote the iPhone, even at the expense of the Android. A few ideas to consider include names like CBS (CBS) and Viacom (VIA), which should win no matter which platform wins.