Lollapalooza Collaborations?

Aside from the confirmation of the leaked line up for this year's Lollapalooza festival (full details can be found at the official website), but Perry Farrell, the main man behind the Chicago event, has also promised a brand new concept:

This year, we have an amazing concept going. For the first time ever, we’re going to be working with iTunes, and we’re going to be creating unique content, so we’re going to have collaborations — people collaborating on songs — and then put them on iTunes, and then they’ll perform them at Lollapalooza for a once-in-a-lifetime experience,” he said. “These will be recorded in a studio, but of course because we can share files online, we don’t have to be in the same place at the same time — we have finishing studios all over the world for the artists to finish the piece off. We’ll start to talk with Radiohead about putting them with someone they’d like to collaborate with, tell them how it’s going to go down.

So, will Radiohead team up with Kanye West in perhaps one of the most unlikely collaborations ever concieved by the music gods? Even more intriguing, how cool would a Nine Inch Nails/Rage Against The Machine effort sound? Which artists on the bill would you like to see teaming up? Please feel free to comment with suggestions.