Factoid of the day: Irrational twitxuberance?

Today's papers are reporting that Twitter is about raise $100 million from venture firms, an infusion of cash that would value the company -- which not only has never turned a profit, but doesn't even seem to have any revenue — at a whopping $1 billion.

As the New York Times's Brad Stone explains:

For context, that is almost double the market capitalization of Domino's Pizza, which has 10,500 employees and had $1.4 billion in sales last year.

I love Twitter. But I fear that we've seen this...