Tracfone's website is so full of sales hype, I can't find the actual information. :|
The $45/month Wal-mart StraightTalk plan sounds reasonable, since you get unlimited phone and Internet. But when I'm not using it, it would be a waste of money.
And it turns out to be run by... Tracfone!
Worst of all, it sounds like customer support is third-world and very poor. I'm keeping it in mind, but other suggestions are welcome.