Last night, I upgraded my Linksys WRT-54GS router to DD-WRT, a more flexible set of firmware with greater capabilities.  It seems to work just fine, and includes many neat additions, such as the ability to adjust the router output power, new security measures, telnet and ssh access, improved QoS routing, and all sorts of other neat things.  If you’ve got one of these routers (check carefully for versions, some recent Linksys routers are incompatible) I’d recommend this distribution as easy to setup and configure.