I like this, though I can only second Mark in the number of my space. Is there a need for the larger "My Space" on top of "My space home"? I assume you want to put the name of the community there, but I'm not so sure if this is really necessary (if, by default, we call the first tab "<community_name> home"). If the small "My Space" *below* SloanSpace is the breadcrumb, great. Otherwise I'd suggest to put it there. Not sure what you want to use the "My Space" for in the header, though...
All I all, considerable improvement and looks really nice. And if you make sure that we can change the colors site wide easily by some parameter (or in a master CSS file), it would be even greater.
