Their Even More 1500 plan now includes unlimited texting and data for only $79.99 per month. That plan of course still includes unlimited calls between T-Mobile customers, unlimited nights and weekends, free domestic long distance, and no digital roaming charges within the U.S.
This plan is part of T-Mobile's stellar effort to rise above the #4 spot among U.S. wireless carriers. As it is a promotional deal, we can't say how long it will be available. Based on the "upgrade or add a line" option, it looks like existing T-Mobile customers can get in on the savings as well.
To put the plan's savings in perspective, we should point out that this plan is $20 less than the Unlimited Everything plan, and $10 less than the standard Even More 1000 Talk + Unlimited Text + Unlimited Data plan. So if you were considering a switch to T-Mobile, this looks like the right time to do so.
source: T-Mobile via MobileCrunch