Lantus released an updated version of his Doom I&II ports with the following changes:

Fixed Dpad crashing issue

Fixed rapid gun bug

Fixed Home button exiting emulator issue

http://www.lantus-x.com/PSP/

A new Genesis/Megadrive emulator for the PSP based on Generator.

http://www.dcemu.co.uk/vbulletin/showthread.php?t=6889

Osakana released an upgraded version of his PCE/TG16 emulator for the PSP.

http://osakanapsp.hp.infoseek.co.jp/

NesterJ, a NES emulator port for the PSP, has been updated.

http://rukapsp.hp.infoseek.co.jp/

Nanashi Soft updated their text game for the PSP.http://psp-news.dcemu.co.uk/karuna.shtmlhttp://yun.cup.com/

Osakana updated his shooter game TP.http://osakanapsp.hp.infoseek.co.jp/

cwbowron released PSP Chess v0.13

http://forums.ps2dev.org/viewtopic.php?t=1760

Osakana released an upgraded version of his PCE/TG16 emulator for the PSP.

http://osakanapsp.hp.infoseek.co.jp/

cwbowron comes up with the release of PSP Chess v0.12. PSP Chess v0.12 has the following changes:

debug info option

option menu (SELECT)

began adding pondering (psp thinks on your time) (not working yet)

added mswap exploit file creation to create_eboot (MS1/EBOOT.PBP, MS2/EBOOT.PBP)

http://forums.ps2dev.org/viewtopic.php?t=1760

fMSX, an MSX emulator for the PSP has been updated.

http://psp-news.dcemu.co.uk/fmsx.shtml