Thanks. That's good to know. As for the jailbreak, it did alleviate some of the headaches regarding the nag screen and also helps the AppRadio app restart sometimes automatically. I have found the the split screen mode has made it more convenient to get in and out of apps and back to the map then constantly hitting the home screen and then hitting the apps button. You'll see this when you switch from 2D / 3D / AppMode (which is the split). Try that if you haven't already.
I don't always get the black non touchable screen but I have a few times. That's when I need to kill all apps and restart the whole thing over. Again with the jailbreak I run background kill all apps which makes it faster and less dangerous when driving but it's basically a big buggy pain in the ass. Oh well...
Hoping in time things change and that Pioneer and the developers don't give up on it.