MTSU is really good:
http://www.sigmanumtsu.com/
Texas State's is very clean and nice looking. HOwever, many of the links do not work:
http://www.sigmanuht.com/
UCO's is nice:
http://www.ucosigmanu.com
Arizona State is nice, and has a very cool house tour video:
http://www.sigmanu-asu.org/
- You know, I would overlook poor design if it came instead with good information. House Tours are always good. Membership total. Pics. Awards. and actually keeping it up to date would be greatness.