I just returned from a meeting in Houston and then found I was unable to access the Android Market or surf with the browser, while Gmail and IM seemed to work fine. I went online to check my T-Mobile account details and there was no data services selected on my account. When I ordered my G1 online I signed up for the US$25 data plan and 400 messages and was getting data just fine until today. I called up T-Mobile customer service and found out that T-Mobile gave everyone who bought a G1 free data access for a while (seems to be about 10 days for me) before the system was supposed to automatically add the G1 data plan. Apparently, my switch didn't get automatically flipped over so the customer service representative made the update manually and I should have full data access again in the next few hours.