So, I just got an Airport Express yesterday, and it completely rocks! I just moved into a new apt for school and am still playing around with my final configureation. Right now I have a Linksys WRT54G router (which will be hooked to the internet once I get the cable connection installed saturday). I then have the AEx set up as a range extender using WDS. But to get that to work I had to turn off a number of things such as the firewall. I am not to worried about my PB with the firewall turned off b/c I have a firewall turned on within my PB. But, my roommates both have PCs and I am worried that once I get internet that their computers may be at risk if they are not behind a firewall. Does anyone know of a configuration with the Linksys router and the Airport Express where I can have the firewall turned on? Thanks for your help