[@Mahz] an idea that just came to me was a badge system. We already have custom titles, but what about allowing people to create groups and letting people join those (invite based, public groups, private groups). You can then upload an avatar for that group and a miniature version could be displayed on your posts under your avatar, maybe next to the 'bio, 2hrs ago' buttons? 

Not crucial to the guild but I feel it'd be pretty cool.