From what I've been told, There's already an EU version for the 770, but it was never released with US maps. It looks like you're in LA from your profile, Tweak (I love that South Park character) so it may serve you well to wait for a version with US maps to be released, then to ask Navicore.

Merlin: I had TomTom Mobile 5 on my last Smartphone and LOVED it. It's just great. I will be ordering and reviewing this for the N800 the moment it becomes available, so will take include a comparison to my experiences with TomTom Mobile 5 and CoPilot Live Q Edition.