T-Mobile's just gone official with the new unlimited plans we caught wind of a few days ago, and while they are truly unlimited by numbers, they're not completely unlimited in functionality. The plans cost $79.99 for Even More customers (buy a subsidized device on contract) and $59.99 for Even More Plus subscribers (bring your own phone commitment-free). Either way this gets you unlimited data, domestic calling, and domestic messaging, with a $5 surcharge for BlackBerry users. Unlike Sprint's similar offering, once you pass the 2GB bandwidth mark, "data speeds will be reduced for the remainder of that bill cycle," essentially informing users that throttling will most certainly take place. In all, we're pleased to see the compromise T-Mo's put in place for data (whereas most other carriers are simply axing the unlimited option altogether), and we hope some of the competition takes heed. It does sound like a pretty sweet deal for those of you not grandfathered in on unlimited data plans. Still, for those of you interested, we suggest getting a jump on, as the (potentially leaked) press release reveals that these plans might only be available for a limited time.