Thanks to www.andahammer.com both Will and I now have the Chameleon 135 enclosure for the Mini2440. I've been working on a li-ion charger and once that's finished we should be ready for some field testing. It takes a little while to get the holes drilled in the right place but once it's screwed together the case is extremely sturdy. There's loads of room inside for additional wiring :)
You can get the Chameleon from www.andahammer.com.