Hi Vincent!
There are two Ex-JW meetups in the Phoenix area.
West Phoenix Ex-Jehovah's Witnesses - http://www.meetup.com/exjw-431/
Chandler Ex-Jehovah's Witnesses - http://groupspaces.com/ChandlerEx-JehovahsWitnesses/
Both groups meet once per month and a few times on other occassions like our annual "Shun Run". The West group usually has 5 to 8 come out. The Chandler group is a bit smaller, but usually 3 of us come out, sometimes joined by one or more others.
My story is very similar to yours. Grew up in Canada (BC) with a connection to the faith since childhood, got baptized at 16, married at 20 (to my wonderful wife Wendy!), appointed a MS, (moved to Phoenix, AZ in 1998) then later an elder. Resigned as an elder in 2005 over my growing belief in the theory of evolution and growing doubts about the existence of God. Ran into a catalyst moment involving my oldest daughter in Oct 2007 that would see me out in service in the morning, followed by leaving the faith in the afternoon.
Cheers,
-Randy
ps. I Google'd some of your art! Love it! My second daughter is taking art in college. One of the individuals I met at the West meetup worked in the art department at Bethel. He often blogs about superheros and Comicon. My wife helped him make his "Plastic Man" costume for Comicon.