T-Mobile has announced that it will implement its $14.99 monthly unlimited tethering and mobile Wi-Fi hot-spot plan starting November 14. This will be on top of any data plan you purchase, and the phone must support this feature in the first place. Right now those phones include the T-Mobile MyTouch 4G, the T-Mobile G2, and the LG Optimus T, with more devices to come as firmware updates get rolled out. At the same time, T-Mobile is offering the 200MB data plan for $10 a month, but bear in mind that tethering won't work with it.
In time for the holidays, T-Mobile is also offering two promotional plans--one for individuals, and one for families. The individual Even More package has 1,500 voice minutes, unlimited messaging, unlimited T-Mobile-to-T-Mobile calls, and unlimited data for $80 a month. The family plan has the same features except it has 3,000 voice minutes instead, and will cost $150 a month. Both plans require new contracts, and there's no word on when the promotion will end.