Looks like Apple was serious when they said their iPhone can set a challenge for the DS and PSP. They've managed to get hold of a number of big name titles for their phone and I think the most surprising one is probably Metal Gear Solid Touch.
Then there's also DDR S Lite, Katamari and Sim City... I even read there's going to be a DJ Max title for it too.
Will be interesting to see what else the iPhone gets.