[jamesbritt]

"I guess a simple way of explaining it is that without the DMCA, grooveshark could not exist."

But it does exist.

I don't see the difference in saying "without law X grooveshark couldn't exist" and "without law Y the RIAA lawsuits wouldn't exist", where law Y is current copyright law.

The copyright laws are what they are; there's nothing magical or sacred about them, so I'm failing to see how adhering to the DMCA is somehow crafty or slick or manipulative. (At least not any more so than current application of copyright law.)