I haven't seen it so far in the req. list, so:
I'm running amuled/amuleweb for my shared dsl connection for 16(!) users.
So far i didn't fall over the switch to trigger display of categories in amuleweb.
As you can imagine with 16 users it gets messy going through a huge list of files to see how your own files are doing.
Also as an additional idea... how about creating a possibility to handle more than just one priviledged user that has only add/delete rights in an assigned category?
I realize that i might be a "lone cowboy" on this one as such shared access must be pretty rare. If it's only lack of time i might be abled to help out in a few weeks (after some annoying exams)

oh btw since this is my first post i'd like to point out what a great job you all did so far, I'm really impressed by amule(d) (coming from iOniX-eMule packed with modifications, kad, webcache etc) and i will definitively continue using it.
the only minus i can speak of so far is the high resource-usage (96% cpu useage pretty much all the time) but that's the wrong place to speak of that and I'll post it in a different category should it start to annoy me.