I actually think things are pretty good right now for those who want to start developing. The code is all
out there, iRex has released
documentation as well as a fully featured
developer environment and emulator, Adam's
VMWare image is all set up and straightforward to update to 1.5 with iRex's instructions and GTK+ is fully implemented with the proper refresh hooks. Sure, it would be nice to have a few other libraries ported such as QT so we could access a larger range of apps, but things are pretty good right now. I think the only problem is the lack of users (due to reasons rhari79 pointed out).
I wonder if this will change.
If plastic logic comes out with its reader and it really happens to kick some iRex ass (I am skeptical), we may never gather critical mass. The DR is a niche device, and unless the price falls people who don't have specific applications for the DR may want to stick to lower priced devices. But who knows...
Meanwhile, there
are a few developers around, lets see what people come up with