I am in Longmont... not sure if there is any group going, but if there is enough interest... I'd be game for a get together somewhere on Pearl St sometime...
Check out boulder.me for some local Boulder activity (not Denver, but shares some events). The Denver New Tech Meetup was tonight, generally a great event.
I work out of Colorado Springs. I'm always interested in networking.
I am from the Denver area. So I'm sometimes there during the summer.