PSP3D have released the first homebrew game runing on 2.01 firmware, heres the info:
"That's right. From Hello World yesterday, to Tetris today. We at PSP 3D have successfully ported the first 2.01 game EVER. Thanks to Fanjita for the tips and for the wonderful GTA hack (props to all the people who helped him too). In the next few days, expect this and more games to be ported to 2.5 also (if and when we get SYSCALs working)."
To install, use the same exact steps as the Hello World.