Having seen Fieldrunners get a hefty update on the iPhone, I checked the PSP store to see if our version was getting some extra-level love this Christmas. Then I noticed there is no real update mechanism for PSP download games.
You have to go to the XMB, game menu, access each game and use the Update feature to check if there is one. That's not a good user experience, and its made worse by the fact that not one of the games I own has been updated, which is a pretty poor show, given how smartphone games thrive on giving their users updates and extras.
So, that's one thing the PSP2 design can fix. Its a simple enough feature that the iPhone demonstrates perfectly... so come on Sony, catch up with the pack!