Image provided by: PSP 3DPSP 3D have ported the first game to be used with the PSP 2.01 firmware. You can consider this as FIRST homebrew for this firmware version. Here are further release notes:

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).