USB powered 802.11n routers show up
 

Officially, the travel router is called the TEW-654TR, and it comes with the router, PSU, case and cables. The first nice feature is that it has 802.11n, the others we have seen are only 802.11g. Next is that you don't actually need the power supply, the router can be powered off a USB port. Once you set it up, all you really need to bring on a trip is the router and a USB cable. Not bad for less than $70.

http://www.semiaccurate.com/2010/03/...-routers-show/