I've been working on a Atari 2600 emu for a while now. It's based off of Dan Boris and Alex Hornbey's code from Virtual VCS. I added sound, and initial (somewhat buggy) Super Charger support.
It is all in C code and I want to release the source and give credit to the proper people. I believe that with others working on the code it can become much better.
Before I make it available to everyone I would like to have some people help test it out and or offer advice on how to do this. For now interested people can go to #ps2vcs on EFnet.
I don't want to piss anyone off just trying to help contribute to the scene.