http://gawker.com/5891675/
"A source with close knowledge of Twitter's financials leaked us revenue, profit, and other figures from the company's recent past. They are not encouraging."
Jan. 2011 – Apr. 2011
Revenue: $23.8 million
Net loss (non GAAP): ($25.8 million)
Jan. 2010 – Dec. 2010
Revenue: $28.5 million
Net loss: ($67.8 million)