I just remember from awhile ago that someone suggested Tabs for profile, you know a tab for art, favorites, friends. Why not try it in forum? (very crude drawing btw)
blue is what you've selected and text at top is the description of each forum. To deselect just click another one :P
just gettin another idea out.. since profile tabs got turned down i'm guessin this one will too :B
The other problem I have with the idea is that... although the tabs would be personalized for AG, couldn't users just open up sections in their own browser anyway? Have a tabbed browsing thing going on, without all the muckiness and coding.
This is what I do. I don't think there really needs to be a separate system for it. People just need to figure out how to use their browsers properly.