First, let me say I have no reason to believe this is specific to a rooted 2.2 setup, but that is where I have seen it twice now (in the 2 weeks or so since I rooted.) Both times I was running the navigation app, when it would complain that it had lost the data connection (running on 3G.) This in an area where I found that hard to believe. Power off the phone and restart it. Gets to the gray screen and... nothing. The first time I left it for 1/2 hour or so and it never came back. The second time I did a battery pull right away, since I needed the navigator app. In both cases, everything came right back up. Any ideas?