Well folks, it's an improvement. I can confirm that I can use the Sprint Mogul internal GPS in Germany without cell service (obviously).
I'm using ROM base 3.56 (using the Kitchen), Rom Date 6/16/2008, Radio 3.42.02
A few specifics. I used VisualGPS to monitor the lock progress. It does take a long time to get a cold lock, around 10+ minutes. Warm locks are a bit faster, perhaps 3-5 minutes with a clear view of the sky. Once it locks, it holds ok, even out the window of a moving S-Bahn.
I was also able to get a lock using TomTom7. TomTom doesn't like being in flight mode, but if you turn on Bluetooth, it fools it. Again, don't expect to use it on-demand due to the long initial lock time.
I did run into the occasional odd reboot where when trying to get a lock the PPC would suddenly reset. I'm guessing it's a bounds check or something in the driver that wasn't well debugged when accessing regions outside the US. I've never had a reboot on my current config, but got three over the last 24 hours of testing...
Anyway, let me know if there are any questions. I'll be here another couple of days if someone want's something tested.