Just thought I would offer this here before the holidays (if it is not allowed please remove). It is a For Sale thread of sorts.... I have been getting people back unlimited data on ATT. This works if you had the data before or if you have never had it at all. Your plan will become a $30/mo for unlimited data (on top of minutes, texts, and other features). Their current plans are $15 for 200mb, $25 for 2GB, or $40 for 4GB +tethering, so this is a pretty sweet deal. The one caveat is you can't tether with this plan (or else ATT will add you onto the 4GB tethering plan automatically). Anyway, been doing this for 100s of people over on eBay and have had fantastic success so I thought I'd offer it here. eBay price is $35 (one time fee) but would do it cheaper for members. Also trade for frags and the like. Let me know if there is interest or if you have any questions. (please do PM me as those are SUPPOSED to be pushed to my email)
I tried sprint for a year and just couldn't handle their data speeds and spotty reception in Ames. Great prices though!
My experience has been that my Sprint 3G is faster than my AT&T 3G was, but they did just put up new towers in my area. I'm not a heavy 3G users (almost always connected to WIFI) so I my experience may not be typical.