I do like AlphaChi's idea.

I had another idea relating more to the posting and registration. In the profiles, having a catagory to list one's organization would be nice. For those that are not in a greek organization they could be listed as either prospective, or non-affliated (sp). This could also give rise to in the identifying block on each post to be listed as:

UserName
Organization
Senior/Junior/moderator/admin

ie mine would look like

Artimis
Alpha Sigma Kappa
Moderator

just an idea.