dasBlog
SubText
BlogEngine.net
WordPress
Movable Type
Oxite
community server?
http://csharp-source.net/open-source/content-managment-systems
http://www.rainbowportal.net/
http://www.mojoportal.com/
http://www.cuyahoga-project.org/
http://n2cms.com/
http://www.dotnetnuke.com/
http://www.asp.net/downloads/starter-kits/the-beer-house/
Web log comparison site
http://www.weblogmatrix.org/
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.