T-Mobile service is down in the USA

If you follow T-Mobile USA on Twitter (@tmobile_usa), you'll know that they had some service disruptions today. If you don't follow T-Mobile, then you may be wondering why you haven't gotten many phone calls today.

Earlier today, they sent this tweet:

All – We’re aware of the current service disruption. Our rapid response teams have been mobilized to restore service as quickly as possible.

The most recent tweet was:

We’re making good progress restoring voice and messaging service to affected customers...

UPDATE 11/03/2009 6:00 PM PST:

We’re making good progress restoring voice and messaging service to affected customers.
At this time, approximately 5 percent of T-Mobile customers are experiencing service disruptions.

Issues began at approximately 5:30 p.m. Eastern time. Our rapid response team is working continuously to fully resolve this disruption.

We sincerely apologize for the inconvenience that this has caused our customers.