Digital Sky Technologies

Groupon is planning an initial public offering that would value the three-year-old online coupon distribution site at as much as $15 billion -- more than double what Google reportedly bid on the company last year -- The New York Times reported.

Facebook's value soars to $50 billion as Goldman Sachs and Russian Digital Sky Technologies invest $500 million in the social network.

Twitter is mulling a new round of funding that could value the company at over $3 billion. This news comes just as Google is in negotiations to buy Groupon for as much as $6 billion. Other large Web 2.0 companies have also been given lofty valuations as well.

Amid rumors that Twitter is considering pursuing another round of venture funding, the microblogging site's co-founder Evan Williams said his company has "a lot of money in the bank," and that its advertising efforts are paying off better than expected.

Facebook has received a $200 million investment, which values the company at $10 billion. That may be setting a few folks, calling social-networking a fad, back on their heels today. Heels or not, Facebook CEO Mark Zuckerberg has created the biggest social network in the world and Russia's...