Folded Toad Froth: Linksys WRT54G with bluetooth console access
My prefered solution for general router console access is via a Bluetooth connection. This Bluetooth connectivity is provided with a Bluetooth module such as the "BlueSMiRF" module sold by SparkFun (see note below). The Bluetooth connection is based on the SPP/RFCOMM profiles which this module supports. Access from Windows, Macs, and Linux systems quite easy. I use hyperterm on Windows-based systems and minicom on Linux-based systems.