Update: Google now says everything's back to normal. "The problem experienced by some users with T-Mobile data connections has been resolved. If you are still having trouble establishing a connection please power down your Nexus One, then turn it back on."
We're getting word from our forums that Nexus One users on T-Mobile are having data problems this morning. Here's the message many of you are seeing:
"To connect to the internet with the device you are using, you'll need a webConnect data plan. Please call Customer Care at 1-800-937-8997 to make sure you have the correct webConnect data plan "
That's no good, and T-Mo's support forums point to a national outage. And as you can imagine, support centers are getting hammered this morning (and likely will get hammered again when this is all over).
Do note that it looks like there are no issues if you're running it unlocked on AT&T (other than being stuck on EDGE, of course), so it's time to look T-Mo squarely in the eye. We'll keep you apprised. [T-Mobile]
Update: Want to see what everybody's saying? Here are some resources: