T-Mob's is bad but not hideous. I think the unlimited one is 70-some dollars a month (which is still stupidly expensive, since it's twice what I pay for broadband at my house, which services as many computers as I want to attach to it).

Wireless data plans are larcenously priced, but they're the only game in town... of course, I didn't even activate that feature on mine, opting instead for merely voice and text, since that's all I use my phone for at present.