I don't have the current numbers, but: - On Twitter's profitability (this is before Sponsored Tweets launched): http://www.businessweek.com/technology/content/

I don't have the current numbers, but: - On Twitter's profitability (this is before Sponsored Tweets launched): http://www.businessweek.com/technology/content/dec2009/tc20091220_549879.htm http://www.businessweek.com/technology/content/dec2009/tc200... - Ev's other startup, Pyra Labs (Blogger), had a successful exit in 2003. There are some better details in "Founders at Work".