I highly recommend the forums at HowardForums: Your Mobile Phone Community & Resource. I'd not had my own cell phone until last week, now $45 later both my daughter and I have not-so-fancy phones (altho hers is a very cute Samsung Juke and I am jealous) and prepaid service that will run as low as $10 each every 4 months.

So, iphone people I am not. But the guys/gals over at howardforums ARE!