Sorry about the crappy cameraphone pictures, but I've got a program compiled and running on the DR1000. If you can't make it out, it says "Hello Mobileread World".
iRex had included the source code for the Hello World program in their SDK. I was able to compile and test it without too much trouble. It does have a few minor issues. The menu doesn't appear to be working, so you can't close out of the program. I'll have to take a look to see what's going on.
I'll work on creating tutorials explaining how to set everything up.
