Hey Rowan... Great idea, and one I pitched (quite some time ago). Every time I bring it up, they tell me "we're thinking about it." I agree in thinking it would really be a hoot, but I think they're main concern is with keeping "the crazies" from being offended - which they'll never be able to prevent.
Check out Cody & Jodie Smith from Bloomflield, NM. They are tryng to start a group in your area. Here is their meetup profile.
http://www.meetup.com/members/9461295/. Drop them a note.
Other then that I don't know of anything else in your area.
Glade to see there’s a group here associated with New Mexico. If you are interested in meeting with other atheist and freethinkers in the Albuquerque area then check out my group Atheist & Freethinkers of New Mexico at
WE are a member of the Atheist Alliance International.