From what I could find (google is awesome), you need at least 5 gallons cage space per chameleon; topsoil, mulch, coco fiber (pretty much any substrate that holds humidity); lots of climbing surfaces, fake plants seem to be more recommended; 75-85° during the day, dipping down to 65° at night, with average of 70% humidity; overhead heating only, UV lighting doesn't seem to be necessary (by general consensus of the couple care sheets I read, but it probably wouldn't hurt); flightless fruit flies and pinhead crickets for juvies, working up to 1/4" crickets and small mealies for adults.
Hope this helps, they seem to be pretty neat little lizards.
These guys are so cute. I wouldn't know the first thing about chameleons, I've never had one. Always wanted to start a Chameleon site though so I could learn