Mobile Email Device for $20.00, $19.95 monthly and no contract!
Sure, you kind of have to like the color, but if you can live with it, Peek Mobile E-mail Device (Aqua)
This is great if you already have a phone, but just want the flexibility and power of getting your work, school, play email on the go without a contract.
What kills it for me is that you need to Peek Pronto to add unlimited text messaging as well.
Still way cheaper than a smartphone, fixed montly $19.95 bill, and no contract. Really tough to beat.