I'm out in Mitchell, SD for a little while and it turns out they have a .NET User Group that's been around for 2-3 years. Unfortunately I missed the meeting last night, since I just found out about them today, but I hope to catch the next one for sure.
If you're in the Mitchell, SD area and you don't know about this group, stop by the CodePrairie.net forums and introduce yourself.
http://www.codeprairie.net/forums