Rolling Stone has a piece on a bar night with under-30 tech entrepreneurs in Silicon Valley. You'll cringe at the seen-this-before clichés (Firefox co-creator Blake Ross, who's among those profiled, didn't like what he read). But what's fascinating aren't the individuals, it's how generation after generation of tech startups keep emerging from Silicon Valley--and how few come from elsewhere in the country. Globalization of the tech industry is real. For the United States, "nationalization" isn't.I know, people will cite all these great smart tech startups in the Silicon Prairie, Bayou, or Meadow that's growing in their region. Of course, you've got a Seattle cluster, and some buzz in Southern California. There are incredibly innovative users of technology everywhere in the country. And the people come from everywhere--the ranks of U.S. tech startups are loaded with Midwestern university grads.

But it's surprising how much Silicon Valley continues to lead the tech agenda and that there isn't more game-changing tech innovation arising from outside Silicon Valley. Online collaboration has India intimately involved with many a Web 2.0 startup. Indiana-- less so.

Maybe the kind of bar nights Rolling Stone profiled, while making for stone-cold boring copy, really do make for brilliant innovation.