I like the archiving idea, and I like the new separtion of categories and sub-categories- it makes it easier to find the stuff I'm interested in.

I still would like to see another color scheme. If customizeable colors can't be done, what about pre-set skins? I can't imagine that the programming needed to create skins is nearly as difficult as going with full-on individual customization. You could create (for example) three or four skins that are pre-set and concrete. Then we would be able to pick which one we like by going to the user CP and clicking our choice. It would be as close to customizing as possible, and I think would satisfy a lot of folks.
-Phan