Ok, I know this exists somewhere, and I am sorry that I can't find it, but where is information about GPSApp? I have seen the FAQ, but it doesn't point to any background information about the app...just the releases and fixes.

1) What do I need (other than the RioCar) to get this working? Specific hardware recommendations?
2) Where is there information about the actual app?
3) Any drawbacks or functionality loss once installed? While working?
4) Why don't I have this running RIGHT NOW on my player because it is soo cool?

Any help (with the first 3 q's) would be great! I am very interested in this app, but it seems that everyone discussing it knows about all this and don't discuss the prerequisites of what is needed to get it working.