Just a heads-up to check your bill if you're with 3 (or ever were).
I used to be, ended with them back in September 2010.
However, I got a bill for 75 cents from them today for 3 x SMS messages. Apparently some third party has billed 3 for services not rendered and 3 have just passed on the charges. They're aware of the problem and will refund you no problem, but it sounds like you have to call in to get it. Apparently some accounts have been charged 100's of dollars.