I think the IRC is probably better for that, or the MPs on the forum. I like the idea of a forum where everybody can read and write on each sub-forum without any restricted areas... (I eventually move some posts from one place to another if needed, but the basic idea is for everybody to see everything and to be able to reply to everything).
I think there are many color schemes we can explore... blue/turquoise, blue/dark_blue, black/green, turquoise/green... it's entirely up to you. If you have ideas, go for it.
We'll probably release Bea in mid-december, so that leaves us a month to come with a nice theme for it. The priority is the usplash theme and the LiveCD splash... because at the moment we're using the ones from Ubuntu. After that we can have fun with the icons, the wallpapers, and the whole lot