I couldn't find any mention of sms/mms marketing? And I thought only DNA was planning on doing advertising to their customers.
It was mentioned in the extra conditions which was shown when trying to change plan/phone. It didn't mention anything about frequency of marketing or anything like that. I still hate any extra marketing, but that deal seems so sweet considering other options that I might give up on my hate for marketing in this case
I have been on the £20 O2 plan the OP mentioned for 18 months now, not too bad. I use ~200~500MB and month with my N82.
If you go wild they can't just 'slap on charges' , they have to give you a warning. If you ignore this they usually recommend you upgrade to a business plan.
1) ATT and T-Mob are the only choices for the States.
2) Only ATT has a pre-paid plan for data....and it's not a real good deal.
3) Doesn't look like T-Mob is going to subsidize the N900.
4) Don't expect any tel-co to inform you correctly or steer you in the right direction!!
You can get the T-Mob 3G unlimited data/sms for $34.99/mo. $24.99 with 400 sms I think.
I have the $19.99 total internet myself but somehow I doubt it would also include 3G.