i do like the idea of your icons. from my own experience of making themes. i would try an put them on the cat page. instead of check marks. i'm free for my three days off cycle. so i can try if you want/would like.
Alright, cool. I'll pm you a link of what I got so far. We'll have to wait until Fledge68 decides to make his move to get it set up fully.
WHO WANTS IT?
This all is neat but how do you expect to handle the checkmarks, x's and +'s for selected, hidden, and required? Sorry but i don't think different colored backgrounds will work. not everyone will no the green is for hidden and red for required. The only real solution i can think of would be to have a small box in the lower left corner (or any corner) of each image for the checkmark, x, or +. Something similar to the little arrow on a desktop icon that means it's a short cut.
Also ... don't get your hopes up. I'm not really wanting to take on re-coding the categories menu. And i'm really lacking the time to take on this challenge. I'm not as fast as Fix. It takes me days to do what he does in a few hours.