Whoops, I hadn't been on in awhile, but I am glad I saw this. Thanks breathesgelatin for remembering me.
As for the information you've requested BetaRulz!
http://www.virginia.edu/ofsl/ (website of the Office of Fraternity and Sorority Life @ UVA).
Hope this helps. It gives good background info on the greek system and has links to the IFC, ISC, BFC (NPHC), and MGC groups on grounds. Good luck to your pledge son's little brother. I hope he enjoys the experience at UVA.