Facebook now ranks as the third largest web company, with a estimated valuation greater than EBay, based on trades of over $16 per share on SecondMarket.com.
Based on recent private-market transactions, Facebook has a total estimated value of $41 billion, exceeding eBay’s $39.4 billion in market capitalization. The only two web companies worth more than Facebook are Amazon, at $74.4 billion and Google, Inc., at $192.9 billion.
I m sure the recent announcement of Facebook new email service is going to further increase their valuation. You can head over here to request for an invite though i cant guarantee how long is the waiting time.