I just bought a Blackberry 7130e phone with Verizon service... for an extra $20 per month, it comes with unlimited email and web service. In fact, just about 30 minutes ago, I connected to the Pelican BBS just to see that it works...and it does.
The screen is small...but from what I understand, it can be connected to a standard laptop and used as a web modem, anywhere, anytime.
http://www.pcmag.com/article2/0,1759,1895827,00.asp