Hi Emily,
I can imagine that'd be a difficult thing to search for, amongst all the forums - having used the search tool a lot. I wondered what sort of things you were looking for in terms of PR ideas. Geared toward recruitment? The community/school? Improving the profile to other groups on campus etc? I don't know if I'll be able to help too much but I'm sure other people will have some ideas on what particular things you're looking for!
In the meantime in case it helps, here are some links to threads which might be of interest. Some are in chapter specific forums & there aren't many of them. Plus, they are all pretty old threads (I happened to have seen them before so was able to locate them otherwise I may not have been) so it's good that you started this new thread as I'm sure the forum members will have lots of fresh new thoughts and ideas! Good luck.
Thread about yearbooks
Public Relations Ideas
Ways to increase PR
Threaded Mode