I got my Classpad yesterday, so this is my first post here.
I wanted to pass on a tip which might be of interest to you. I have collected a few calculators over the years, and given that they can be quite expensive, wanted a sturdy container to protect them should I take them somewhere.
I bought this Otterbox 3000 to protect my second hand TI-86 which I use at work, but am pleased to find that its a perfect fit for the Classpad, ideal as I take it to the office to play with over lunch.

I have used an old mousepad, cut in half and glued together to form a 6 millimetre spacer in the tray, and the Classpad fits perfectly.
The box itself is a generic design, but is ideal for the TI-84 and TI-89 calculators too, is waterproof, extremely strong, and floats in water. Check out the Otterbox web site at http://www.otterbox.com/
UK readers can get them here: http://www.psalmgear.co.uk/
Mark