ClrMamePro v3.52 was released today, it fixes the "fix rom name" option that was erroneous in the last release. Click here to visit the official homepage.
Reminesce was updated to v5.0.1 earlier, this is an NES emulator that gets updated normally. Below are the changes in this version. - Official Homepage
Modeler is a Sega arcade emulator for Macintosh. The only information I know about this released was made because the programmer wanted to be able to play Outrunners. Click here to visit the official homepage.
GuineaPig is a SEGA Genesis/Megadrive, Atari VCS 2600, Mastersystem (SMS), GameGear (GG) and NEC TurboGrafx/PCEngine (TG16) Emulator for Palm OS. Below are the details for this release. - Official Homepage
As an NES emulator author, I recommend Nestopia, it runs on very slow machines at 100% speed and 100% accuracy on all the games it supports. There's usually no game you can throw at Nestopia and it won't work.
EmuLTI 8 was updated recently, it's a Mitsubishi MULTI 8 emulator. I don't know what progress has been made, but you can visit the official homepage here.
vNes is an NES emulator for the Symbian platform and can run under J2ME. You may download a trial version or buy the full version for $9.90. Below is what's new in this version. - Official Homepage