Web 2.0 living on borrowed money

The bad news? While a few startup stars like Twitter and Slide can get venture cash on little or no revenue, the expiration date on your "it's [blank] with a social network layer" pitch may be well past. "There is going to be a shake-out here in the next year or two," Battery Ventures partner Roger Lee told the Financial Times. Mitchell Kertzman of Hummer Winblad was a little more succinct: "If you look at some of the valuations, you wonder what fantasy of revenues they're based on." The kinda good news? Google will help subsidize the cost of entry for early-stage online projects with infrastructure — you'll just have to use their Web Apps cloud and their Gears and Android clients developing browse and mobile applications, respectively.