Dark_AleX has released version 2 of his 1.50 kernel addon for custom firmware 3.90 M33. Remember, this is for PSP Fat users only. Does not work with the Slim.
Changes:

TA086: when being in 4th brightness level and recovering from sleep mode, the display was black. Fixed.
Added support in the 1.50 kernel for memory sticks greater than […]

weltall has released CWCheat 0.2.1 Revision A, the cheat device for both PSP and PSX emulated (POPs) games. For anybody likes cheating, you won’t want to miss this.
Changelog:

[ALL] Added a polish translation thanks to Bolec
[ALL] Fixed a memory leak in the text reader
[ALL] reworked partially cpu clock functions. now they will be able to […]

Here’s the latest version of Zx-81’s PSPAtari — the Atari 800/130/5200 emulator for PSP.
For those who haven’t seen previous versions, Atari800 is an emulator for the 800, 800XL, 130XE and 5200 models of the Atari personal computer. It can be used on console, FrameBuffer or X11.
PSPATARI is a port on PSP of the version […]

Zx-81 has released PSP7800 version 1.1.2, the Atari 7800 emulator for PSP. This is probably the final release so enjoy.
Changes:

Major speed improvements (> 60 fps at 222Mhz) but limited at 50fps by default
Auto-fire mode, press RTrigger+X to switch it on/off useful for games such as space Xevious!
On given games, the auto fire can’t be stopped […]