Venture capital firm GSV Capital (NASDAQ: GSVC) will sell an additional 3 million shares of common stock in order to raise funds that it will use to buy interests in Facebook, Twitter, and Kno Inc.. The company will also use the funds to invest in Dropbox, StormWind, DreamBox, Grockit, ZocDoc, and other young internet-based companies.

Facebook filed a highly anticipated five billion dollar IPO last night, which has made the entire social media sector boom today. LinkedIn (NYSE: LNKD) is up nearly 6% and Groupon (NASDAQ: GRPN) is trading up almost 7%. As a result, the Global X Social Media Index Fund ETF (NASDAQ: SOCL), in which aforementioned stocks have a significant weight is up 2.5%.

Turns out there's billions to be made from FarmVille cows and crops.

Shares of online gaming giant Zynga (ZNGA) opened at $11, 10% above their initial offering price in the public debut of the stock on Friday.

Echoing the dot-com boom a decade ago, a wave of Internet companies with lots of buzz but shaky business models went public this year. Here's how they've held up.

Demand Media

Ticker: DMD
IPO date: January 26
IPO price: $17
Now trading at: $8.06
Revenue for first 9 months of 2011: $240 million
Loss for first 9 months of 2011: $15 million