One of my guild-mates mentioned that in GW1, there were contests for users to submit armor designs and the winner would have theirs added to the game. My Google skills are failing to confirm this, but this is something I would love at least to have an option of participating in. (I didn’t play the first game much, so if anyone knows for sure if that was a thing that would be interesting to know.)
I have some concepts/sketches floating around and while I know I’m merely an amateur and well, I don’t even know how to do 3d modeling, but I think this would be great fun and a way to collect some diverse ideas – and on a selfish note I’d be curious to see what all the great artists would contribute. 
edit: kitten , how does I keywords. Now I’m seeing there was a weapon design contest in ‘07, though I don’t see an armor based one.