Roughly half the size of standard PC Cards, ExpressCards are a compact, high-speed replacement of the old PCMCIA card. It's now available on 50 platforms from major laptop manufacturers and can also be used on desktops.

Sprint expects to start making EV-DO-Rev. A Connection Cards commercially available in the third quarter of 2006. Sprint will feature two models - the Novatel Merlin S720 and the Sierra AirCard 595. No doubt they will eventually be available in USB and ExpressCard form factors, too.

Combined with a Linksys Wireless Router ($200), you might unwire taxis, buses or trains. Of course you could wait for a USB Mobile WiMAX card (above) and mobilize a bike (below) like Intel demonstrated at their Developer's Forum earlier this year.

More info at Sprint ,Novatel Wireless, EVDOInfo, Everything USB, MobileTechNews, and BB Exchange.