I don’t think you are going to want one of those exo terra enclosures for a colony of pygmy chams. It will most likely be too small for a group and the air flow is not that great either. Depending on how many you want to keep, the size of the enclosure, and modifying the top for better air flow – it may be suitable. You are going want some Rieppeleon brevicaudatus (formerly known as Rhampholeon brevicaudatus), since they are the most common and easiest to keep (but like any other cham they are considered an easy herp).
Here is a link to an article for setting up an enclosure: http://www.chameleonnews.com/humidifier.html
There are only wild caught specimens available and people to typically sell them are IMO “shady” with their business practices. In the next month or two I will have some captive bread ones from 2 different blood lines for sale. Here is a pic of a one of the females I am keeping for myself. She is about 3.5 months old here – and quite beautiful.
-roo
