I just wanted to stop in to plug the Relay For Life, which is an event sponsored by the American Cancer Society. It's designed to both commemorate and honor victims and survivors of cancer, as well as to make money. It's a pretty straightforward: you raise money by collecting pledges (not NMs, the cash kind) from people, and by any other kind of low-key fundraising, like bake sales. Then you and as many of your friends / GLO members you can get together camp out all night. The idea is to have at least one person walking a set course (for example, around the quad or a track).
My chapter did Relay this year on our own campus. Many colleges have their own Relay, but if yours doesn't, there are usually local events on a city- or county-wide basis. If not, you can always start your own.

ACS is really great about helping to start these kind of events.
They're totally easy to join -- all you need to do is find some people willing to participate, name your team after your GLO, get some camping gear, and you're good to go. Everything else is set up for you. It's a great way to improve your PR, it's a wonderful cause (all proceeds go towards cancer research), and it's also a great sister/brotherhood activity. It's also a great way for Panhellenic and IFC to engage in some friendly competition -- again, for a good cause.
Anyway, if you'd like any more info, there's a Relay For Life website at
http://www.cancer.org/docroot/GI/gi_1.asp, or you can poke around the American Cancer Society site (
http://www.cancer.org). Or you can PM me, and I'll try and help you out.
Happy philanthropying!