I would like to humbly suggest that you start allowing small images to be posted in user's signatures. This would facilitate the use of signature banners and the like. You could limit it to something like 300x100 or around that (whatever you like) I think it would really spruce up the place and add some visual variety, to mention adding a nice customization element to user's profiles. Users tend to really like this feature, I know I sure do.

Thanks lads!
Slàinte mhath!