As of late yesterday, Google and Microsoft had each announced separate deals with Twitter to include tweets in search results. While the details of each deal were undisclosed, this appears to be the first real source of income for a company that has subsisted entirely on venture capital since its 2006 inception, topping up at $155 million (figures in left sidebar) as of September this year.
UPDATE:
CEO Evan Williams spoke to Fortune this week about why income and cash flow are not presently the focus at Twitter.
