Dark_Alex has released yet another gem for your PSP: 2.71 SE Rev. B custom firmware is now out!
For those of you kept out of the loop, this custom firmware features the homebrew compatiblilty of 1.5, with the features and UMD compatibility of 2.71! The installer is only out for 1.5, with an included updater for 2.71 SE-A users.

New features include:

• Native ISO emulation. Supported formats include ISO and CSO
• Ability to change what kernel will run programs in /PSP/GAMES/ (Located in recovery menu)
• Autorun program at /PSP/GAME/BOOT/EBOOT.PBP (Located in recovery menu)

Note: This writes to your PSP\’s flash, so USE AT YOUR OWN RISK! (This also will NOT work on a TA-082 PSP)