I agree with the penny saved mantra, the "A" rPi board will be the preferred platform for the HeaterMeter Pi. I can't imagine they'd change the position of the existing connectors so the HeaterMeter board should mate with it implicitly. I too will be repurposing one of my rPi for entertainment purposes once the "A" is released. At some point I'm hoping they'll make a WiFi-included version with no ethernet and that will be one less thing to worry about.Designing the case took about half a Saturday. This included time to experiment with Ponoko as well as learning the Inkscape software and printing and assembling a cardboard prototype. If you've planning to do it, something that took me a while to figure out was that the Ponoko template has a built-in scaling factor that messes up all the measurements. To get accurate sizing, you have to build the parts in a clean inkscape document, then import them into the P1/P2 templates which will scale them properly for the laser cutter. It is quick and easy to import them, so it isn't a problem, it just means you can't design right in the template.I've also spent some time writing up the assembly and install procedure which just needs some touchup and the images added from my the HeaterMeter Picasa. Suggestions are encouraged. Still need to build the Digikey and Mouser projects.