Here's a simple little thing that might be a nice feature to have.

When looking at the drop down list of folders, I'd like it if there was a little number next to the folder name that told how many items were in that particular folder.

Something like this:

Books (3)
Computers (5)
Imported Images (0)
Misc (10)

I'd see this as a big time saver and it would probably help reduce clutter by reminding people to keep their folders cleared up...(at least that's how it would work for me).

Mike