A few from when I was in school. They all sound a lot alike--rock/folk/blues mix. Live shows are awesome. I don't know if they're all still playing together or not.
The Nadas www.thenadas.com They've been together 10 years now. All 4 of the founding members were members of a GLO at Iowa State--3 Pi Kapps and one Phi Delt. The Bass player has since left the band and been replaced. I will love this band forevah.
Dazy Head Mazy Just a lot of fun. I think they know almost every member of Tri Delta from when I was in school by name, so many came to their shows.
Domestic Problems Great band from Michigan.
The Why Store Mr. ISUKappa's favorite band from college. The lead singer sings/looks/acts like he's constantly stoned.