If $30 is going to break you then maybe a flip phone is better suited....It's really that simple...
That's $720 over the term of a contract and when I was a student I was living on student loans. Which means that by the time I paid back $720, it would probably be around $1400 with interest.
If WiFi is available around campus, then spending that money for a data plan is not a smart move for a student.
With the Nokia N900, I can stick in my T-Mobile SIM card and use WiFi. The SIM card gives me voice access at about $100/yr (prepaid - I get 1000 minutes and they last me about a year). I can use Skype and/or Gizmo/GV with WiFi for a lot of my voice calls. I can also use all the phone's smartphone and computer features (except GPS atm) with WiFi. So a data plan is just not needed. (The phone companies are apparently brainwashing people about these data plans as evidenced by the non-thinking replies on this and other forums.)
BTW, the N900 is probably a better phone for a college student, especially if you are studying computer science or engineering or something like that -- or if you love technology and can tinker with it. Buy an unlocked N900 and it will save you a lot of money in the long run if you can use a low cost voice plan and WiFi. Check out maemo.org.
EDIT:
Smartphone Wars: Nokia N900 versus HTC HD2 versus Motorola Droid (5) | IBTimes
Smartphone Wars: Nokia N900 versus HTC HD2 versus Motorola Droid
But now the final whistle has been blown and it is time to announce the winner of the slugfest. That's right, folks! The fight has been long, bloody and closely contested but only one phone has emerged as the winner, albeit bruised, and that is - the Nokia N900.
That's right folks!! The N900 is the king of the square ring as it packs killer punches such as the revolutionary Maemo platform, a camera with excellent optics and features, 32GB internal storage, and choices of a full Qwerty tactile keyboard as well as a virtual onscreen keyboard.