Google Inc. (GOOG) has been on a mobile tear recently with its Android mobile operating system, and the Android Market may become a more potent competitor to Apple Inc.'s (AAPL) App Store if a new "business market" is introduced. Whereas most of Apple's App Store for the iPhone is filled with consumer-level applications, Google may have ambitions to take its Android platform higher than Apple's lofty perch here.

When Google (GOOG) released its Nexus One concept phone last weekend to some of its employees, the blogosphere and industry pundits went on a feeding frenzy: Would Google try and release its own wireless phone and compete directly with its existing carrier customers? Could a Google Phone give Google even more power of the information that controls our daily lives? Amol Sarva, founder of the Peek device that resembles a smartphone but only does email, chimed in on the Google Phone, which Google has coined the "Nexus One."

Sarva called Google's offering "every bit as good a piece of hardware as the Droid or the iPhone." To many, those are fighting words. Apple's (AAPL) phenomenal success with the entire iPhone ecosystem (iTunes and App Store) won't ever be matched, but Google has the best chance of anyone to get close. Indeed, the Google "Android Market," which offers applications for all the various Android-powered handsets, now has 20,000 programs available for download in just over a year. Apple had 50,000 in its first year.

Tired of the prudes over at Apple (AAPL), who keep a tight leash on filth in iTunes? Well, it seems like the folks at Google (GOOG) are keeping an open mind. Even though its Android Market isn't playing in the adult space, Google isn't preventing adult-only content from getting on its devices, while Apple has made it a point to keep its iPhones and iPods clean from the start.

The latest entrant into the Android experience is a company called MiKandi (say it, "my candy"), which provides mobile access to the hot stuff you can enjoy on a screen of any size. MiKandi has no connection to Google other than the use of its technology.

By 2013, more than $4 billion will be spent on smartphone applications, according to a new study by the Yankee Group ... and the estimate is said to be conservative. With the average owner of one of these devices downloading around 20 applications a year, it's obvious that this market is getting ready to pop. Currently, only $343 million is spent in this space.

An increase in the number of smartphone applications available -- for Apple's (NASDAQ: AAPL) iPhone, Reasearch in Motion's (NASDAQ: RIMM) Blackberry, and Google's (NASDAQ: GOOG) Android -- and rising prices for these applications will push the total size of this market higher.