Users of a 2.80 firmware PSP can now rejoice, the first piece of homebrew using the recently found libtiff exploit is now out there. Noobz brings you a version of Tetris that runs on your 2.8 PSP. Simple download the Tetris package, extract it to your ms0:/PSP/PHOTO dir and play away.
While a bit simplistic, this shows us that playable homebrew on a 2.8 PSP is a reality. If I were you I would hold off on installing that 2.81 firmware update.
[Update 1: I neglected to mention in the article that this runs on any PSP with firmware 2.0 - 2.8, I just stressed the 2.8 fact due to it being so damn cool :)]PSP Fanboy]