Matthew Smith will be giving a talk about advanced usage of Linux on the WRT54G.

Short description of talk:

Topic 1: Using the WRT54G to make a cheap network bridge.

Topic 2: Using the WRT54G to monitor and control the physical world. I'll
talk about how you can monitor input pins and turn on/off output pins. With
a simple circuit (which I'll show) you can control anything you want.

Extra Links

Openwrt site:

http://www.openwrt.org

WRT54G compatibility information:

http://wiki.openwrt.org/TableOfHardware

DD-WRT:

http://www.dd-wrt.com/

Doing the serial mod (includes where to buy the pcboard):

http://www.rwhitby.net/wrt54gs/serial.html