More abilities to change your title
I don't know what forum software you're using, but Amdmb.com is using the exact same software. Over there, after a certain number of posts, you can change your title to what you want, probably like 100 or something, I dunno really. I think that'd be a neat addition to these forums, the ability to customize who people see you as.
It still follows newbie, member, senior member, but then it probably has built-ins but you can change them.