Meet up with Montana Linux people on IRC. We currently gather at the #ubuntu-montana room on the freenode network. Stop in and say "hello" or even ask/answer some questions. Don't have to be a Ubuntu user either. Or use the web-based chat client.
The BillingsLUG hasn't had a meeting in a while but they are hoping to start back up real soon. Really.
The BozemanLUG meets on the FIRST Thursday of the month at 7PM
EPS Building, Rm 259
Used to be the LAST Thursday, but we changed it.