T-Mobile has teased an announcement coming tomorrow via Twitter, and the early buzz has been that the announcement will have something to do with tablets. Of course, T-Mobile apparently didn't square away with Apple that it was trying to hold on to some mystery around the event, because Apple's website has kind of spoiled the surprise by giving out the iPad data plan pricing on the carrier...
Source: http://www.phonearena.com/news/Apple-outs-T-Mobiles-tablet-news-gives-iPad-data-plan-pricing_id48605
Source: http://www.phonearena.com/news/Apple-outs-T-Mobiles-tablet-news-gives-iPad-data-plan-pricing_id48605