It had to happen, in fact I would've been VERY surprised if Mr Tony Hawk and his bit of wheeled plywood hadn't been released for the PSP. And to aim at the younger market, Activision have slung the webbed wonder onto it too.

"We are excited to have two of our biggest brands available as launch titles for the PSP," said Kathy Vrabeck, president of Activision Publishing. "Designed to leverage the processing power of the new platform, Spider-Man 2 and Tony Hawk's Underground 2 Remix deliver deeper gameplay experiences and graphical advancements that take handheld gaming to the next level."
Check out the full press release here.