The “XRay” project I’ve been working on has been posted to the Stimulant site, and talked about here, here, and here. The implementation is pretty simple — two data-bound ScatterView instances, some funky bitmap manipulation, and a WCF service to send the images to the device over HTTP. This approach means that not only did I not have to figure out how to write iPhone apps (yet), but that it also works on Android (really well) and on Windows Mobile (sort of).