the dude above has a point about energy costs but unless you live in california, I don't think you'll have a problem. win2k server/adv server can make a better router than win2k pro and you can install a software firewall but from my experience, win2k serv/adv serv + isa server 2k + 1 or several NICs, you can even mix it up, 1 wireless, 1 hpna and 1 ethernet nic and you got your self a nice, configureable and secure software router + firewall but I wouldn't use the machine (as in web browsing, gaming and downloading/installing software). that's probably as good as it gets on the windows side of software routing + firewall, and then you have your linux equivalents which I've never tried. In general thought, software routers are more configureable and you gain more experience/knowledge on networking by building/configuring one (if you're a newbie, I know I learned a lot). and if you don't like the software package you can always try another unlike hardware routers.