it's not any harder than any other linux platform; you just need to account for the small screensize (800x480 if I remember correctly)
The big win is that you can port existing linux apps targeted at other mobile platforms (or even desktop platforms, if you can make them work at 800x480) You also have a full linux stack for debugging on-device.
The big win is that you can port existing linux apps targeted at other mobile platforms (or even desktop platforms, if you can make them work at 800x480) You also have a full linux stack for debugging on-device.