The boys over at PSP Hacking 101 have released Episode X.

Here are the show notes:

Fimware Launcher – 2.5 web browser on 1.5 PSP
Download it – http://mphwebsite.tuxfamily.org/index.php?program=14
Help – http://mphwebsite.tuxfamily.org/phpBB2/viewtopic.php?t=54

PSP Firmware by Box

http://www.psphacks.net/content/view/437/2/

Preview of Quake 2 Port

http://teamemergencyexit.blogspot.com/

http://www.teamemergencyexit.com/

You can download it here.