I just put some ideas in my head and began building it piece by piece. My advice would be to take your time, think ahead, and really research/explore your local hardware store for parts/ideas.
The 2 things I would change if I built it again are to put a solid back for the entire backside of the cage (have plastic 3/4's of the way down) and to put in some sort of 5" splash plates around the bottom of the cage to prevent droplets from the mist system from splashing out of the cage and onto the floor.
http://www.people.cornell.edu/pages/tjr32/Images/v1.JPG
http://www.people.cornell.edu/pages/tjr32/Images/v2.JPG
http://www.people.cornell.edu/pages/tjr32/Images/v3.JPG
http://www.people.cornell.edu/pages/tjr32/Images/v4.JPG
http://www.people.cornell.edu/pages/tjr32/Images/v6.JPG
-roo