Firstly, excellent work to everyone involved in the project, I really mean that.
After playing around with linuxmce for a while, I think I am going to volunteer to do some work on the UI.
My time is pretty limited for the "indefinite" future, perhaps a cpl of hours a week, but should be enough to get some progress done.
I'm not going to offer up any suggestions until I've had a chance to review the code a bit more thoroughly, but am hoping to be able to develop some sort of framework that allows others to put together there own skins.
If any developers have any suggestions, or has any prior work done please let me know.
As for user suggestions, I'll crawl through the Feature Requests forum when I get a chance.
Great to see your interest in helping out. A good place to 'hang out' and both get to know the active Devs and also get help with getting your head into how the sources are organised etc is the #Linuxmce-dev channel on irc
All the best