Mirakichi-san has released v1.141 of RIN, the GB/GBC emulator for the PSP
http://mirakichi.hp.infoseek.co.jp/software/RIN.html
This version combines many new additions by several Japanese developers, a snippet from the English readme (done by me, full credit must be given of course):
---[What's New]---
v1.141 (2005/05/23)
+ Fixed error accessing memory stick if sleep function is used
v1.14 (2005/05/23)
+ Analog pad sensitivity adjustments (kmg)
+ Control Motion Sensor via analog pad (Tilt N Tumble, etc.)
+ Adjusted key configuration's shortcut key input
+ Added "AnalogPad to D-Pad" option in key config
v1.13 (2005/05/22)
+ Performance Improvements (LCK & ruka)
+ ZIP File support (henoheno & ruka)
+ Analog pad support (kmg)
+ Various items added to key config
+ Ability to define simultaneous button presses in key config
+ Others
Full readme will soon be found at Emuholic.com and other sites; it's already on PSPwiki
Enjoy!