On the Acela Express from Boston to NY, a MotoQ/PDANet cocktail is just the ticket
Right now, I'm aboard the Acela Express train from Boston's South Station to Penn Station in New York City and I've had connectivity to the Net pretty much the whole way thanks to my Motorola Q and an awesome little app that I've written about before called PDANet from JuneFabrics. PDANet takes the Motorola Q (and other smartphones) and turns them into wireless broadband modems that can be used by your PC.