This post is one in a series in which more than 60 newsletter advisors share their Top Stock Picks for 2011. This special report is courtesy of TheStockAdvisors.com.

"The smartphone revolution -- with web-browsing, video-watching, music-streaming mobile devices -- has made bandwidth a scarce resource," says small cap specialist Ian Wyatt.

The editor of Small Cap Investor PRO explains, "That's where Allot Communications (ALLT) comes in. Allot is an Israeli company that develops deep packet inspection (DPI) technology specifically designed to manage bandwidth use.

Usage and demand for wireless data services is surging; according to the U.S. FCC data use has soared by over 700% in just the past four years alone," says Neil George.

In his Stocks that Pay You, he says, "We suggest you look at four companies involved in different aspects of the developing 4G network, which will provide for easier handling of more data, particularly in mobile devices."

MOST NOTEWORTHY: Jones Lang LaSalle, Digital River, Dynamic Materials, Allot Communications and Oxford Industries were today's noteworthy downgrades:

• Wachovia downgraded shares of Jones Lang LaSalle (NYSE: JLL) to Market Perform from Outperform, as they expect the deterioration in the credit markets to lead to fewer closed deals over the next year.
  
• Oppenheimer transitioned coverage of Digital River (NASDAQ: DRIV) and downgraded shares to Neutral from Buy. The broker finds shares fairly valued given the pricing pressure and customer concentration.
  
• Jefferies downgraded shares of Dynamic Materials Corporation (NASDAQ: BOOM) to Hold from Buy on valuation as they believe shares are already pricing in the company's near-term earnings potential.
  
• Allot Communications (NASDAQ: ALLT) was downgraded to Sector Performer from Outperformer at CIBC World Markets after the company pre-announced weaker-than-expected Q3 results.
  
• Oxford Industries (NYSE: OXM) was downgraded to Hold from Buy at Morgan Joseph and to Neutral from Buy at SunTrust following the disappointing Q1 report and guidance.

OTHER DOWNGRADES:

• Piper Jaffray downgraded Target Corporation (NYSE: TGT) to Market Perform from Outperform.
  
• Thornburg Mortgage (NYSE: TMA) was downgraded to Underperform from Market Perform at Keefe Bruyette.
  
• JP Morgan removed Continental Airlines (NYSE: CAL) from its Focus List.
  
• NRG Energy (NYSE: NRG) was downgraded to Neutral from Buy at Calyon.

Despite the difficulties faced by Vonage (NYSE: VG), the future for VoIP -- Voice over Internet Protocol -- remains attractive to growth-oriented advisors. Jim Oberweis Jr. notes, "VoIP is finally gaining traction -- and people are now getting rid of their phone lines in droves, as the quality of VoIP has dramatically improved."

Indeed, the money manager and editor of The Oberweis Report notes, "At my home, we've replaced our regular phone service with a VoIP connection and I find it virtually indistinguishable from traditional land-line connections."

For those unfamiliar with the technology, he explains, "With VoIP, your voice is converted into a digital signal that travels over the internet. The price is right -- around $35 bucks a month -- for unlimited calls around the world."

Importantly, he does not see the upside opportunity among telephony service providers. Rather, he sees the potential among companies that make the equipment that enables VoIP networks to operate.

He notes, "VoIP is causing an exponential increase in demand for bandwidth." And that, he notes, takes lots of investment and equipment. It represents, he suggests, "the renaissance of the telecommunications equipment industry after six long years in the doldrums." So what companies will benefit from this renaissance?