This does look interested to say the least... I havn't gotten to far in reading the actual spec though. The part that concerns me is that the virtual-shrinkwrap agreegment says that all products using the "open" specification must be certified by The Powers That Be. What I havn't been able to tell is if the specification gives enough information to actually implement navigation, or if it requires some secret code to unlock that they only give you once you're certified.

Anyone who's done more work on this want to comment? It looks like the spec has been around for a while...

Matthew