Back from a rather long hiatus, Japanese PSP Developer Takka has released an update to his infamous UO gpsp kai PSP Emulator. With the zip bug finally fixed and many other fixes this could just be the best PSP GBA emulator out there…. Oh and welcome back Takka. We look forward to more future updates.
Changelog:

The big [...]

Akop has released an update to VICE PSP, his Commadore 64 aka C64. Akop c64 emulator is a port of the popular VICE commadore 64 emulator. What’s new? Well the sound issue has been fixed, however there are some issues present. the FPS counter sometimes reports incorrect data after frame skipping goes into effect…
Source: Akop’s [...]

JPCSP.org have released another new build of their Java PSP Emulator. Revision 1064 bringsa few tweaks and bug fixes to the emulator.
Changelog:
r1064 added io ctl cmd 0×01010005 (umd file seek set, issue 88)
r1063 Fixed interpretation of Z for 2D Vertex, tested with 2DStudio.
r1062 sceIoPollAsync() should yield in all cases to allow the async IO to [...]

Zx-81 seems to be rolling out the updates, as he releases an update to PSPColem. The ColecoVision Emulator for PSP. Version 1.2.1 brings many changes, including improved emulation. Now runs at 60fps at only 133 Mhz. New background music, graphics and added auto-fire support. See below for the full changelog and download link.
* Improve emulation [...]

The team behind JPCSP (The Java PC PSP Emulator) have rolled out another update for this emulator. More tweaks and bug fixes. Here’s the changelog
Changelog:
* sceSasCore: fixed problem due to multi-threaded access (now synchronized methods)
* sceAudio: play the audio output larger than the AudioLine buffer size in a background thread (analog to sceSasCore). This should [...]

The Daedalus X64 team have released an update to there N64 emulator Daedalus X64 beta 2. This release introduces a number of tweaks and bug fixes.
Changelog:

DaedalusX64 Beta 2 Update:
[!] Fixed crash when loading 2nd ROM on Phat (Kreationz)
[+] Roms up to 16Mb loaded into Slim Memory (Kreationz)
[-] Removed Double Display Lists (To be replaced with [...]

Keeping with improving the PC PSP emulator called JPCSP, the team has rolled out another update tweaking the emulator just that bit more. While not a huge changelog, its worth a mention for users following PC Java PSP emulation.
Changelog:
* updating syscalls/nids
Source: JPCSP Forums

An anonymous Japanese PSP Developer has released a new version of gpSP GBA Emulator labelled gpSP 20090413. Its based of the gpSP kai source code and while not much is now as there is no release text. It does feature a number of bug fixes.
Source: pspnfo

The team over at JPCSP.org have released a new version of their popular PC Java PSP Emulator. This new release has the following changes added:

Updated the debugger:

Added address highlighting for jumps and branches.
Replaced the Look and Feel list selection with our own, now register highlighting on the selected line is readable.

RTC updated:

Fixed psp time fromMicros.
Improved [...]

Uberjack has released an update to his Zx Spectrum Emulator called Fuse PSP. In this latest release uberjack has added many new features like, tape rewinding, a tape browser and he has fixed the disk status icon bug.
Changelog:
Version 0.10.0.21 (April 07, 2009):
* Bugfix: Tape/disk status icons should no longer clear when switching between emulator and [...]

Akop has today released RACE! PSP 2.16, RACE! PSP is a Neo Geo Pocket and Pocket Color Emulator for the PSP. New features include a time rewind feature, handy if you just hit the game over screen. You can now rewind a bit and try again.
RACE! PSP 2.16 Changelog:

Time Rewind feature: map ‘Special: Rewind’ to [...]

The JPCSP project have released JPCSP v0.2 Revision 956. This is a Java PSP Emulator, that’s right not a PSP Emulator for the PSP – But a PC based PSP Emulator. No PSP required!
While in its early stages, it can emulator many PSP UMD games at a reasonable rate. Its no PSP, but the next [...]

Zx-81 has released an update to PSPMO5, the Thomson MO5 Emulator for PSP. This version is a port on PSP of version 11 of DCMO5 which is undoubtedly the best Thomson emulator out there.
Changelog:

- Cheat support !
- Finally fix issue with “Home -> Exit” !
- Add documentation for settings in help menu
- The virtual keyboard [...]

Oops ware has released FinalBurn Alpha 4 PSP v12.4 (FBA4PSP). The PSP emulator which emulates PGM, Cave, CPS1/2/3, Seta, Sega, Konami and MC68000/Z80 based arcade games. While there is no change log for this newest release, we can assume there are improvements over previous versions.
Source: Sourceforge

With DaedalusX64 Beta 2 released, the developers have started to look at ways to yet again improve on the N64 Emulator. In DaedalusX64 Beta 3 they plan to do some major bug squishing, add a new GUI, some code clean up, add dynamic buffers based on ROM size and PSP type.

With Beta 2 successfully out [...]

The long await and much anticipated DaedalusX64 Beta 2 has been released. With a huge amount of improvements and enhancements from many PSP developers, including Chilly Willy, howard0su, Wally, and the original developer StrmnNrmn. Noticeable improvements with the Media Engine and built-in speed hack detection. Give it a try!
Source: DaedalusX64.com

Mario 64 runs pretty damn fine [...]

Update 03/02/09 DaedalusX64 Beta 2 released!
Check out the latest DaedalusX64 Beta 2 video, as you can see its shaping up mighty fine. Very smooth looking compared to the first N64 emulators. This is a preview of revision 306 which is a debug build from the team’s subversion repository. Wally says the released date hasn’t been [...]

Seeing that many users have been having trouble installing PSP Emulators. I have decided to continue my Easy Installers (some may remember my hombrew and CFW easy installers). This is my first new release of many installers to come which will take the hassle out of installing emulators for users that have trouble.
Today’s easy installer [...]