Seconding Glenn Reynolds
I have the Kyocera router he touts today, lauded and reviewed here. I second the good reviews. you carry your own WiFi everywhere, and if you have a Mac, it's particularly useful, since EvDo cards don't work on Macs. In some distant places - and Ptown is stuck on the end of a long peninsula - the service is not much better than dial-up, I'm afraid. But most other places, it's mobile broadband. Works on trains too.