Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com
the squeeze box player is working in .35, but we don't use sw clients to work with slimserver, i think one of the programmers used an emulator when he worked on squeeze box.but i don't know other details, like what he used, i just remember seeing him once playing.