I've currently got a router setup with a 10/100 card as the external NIC, and an Intel 10/100/1000 card as the internal NIC, and am running a pure Gigabit network (through a Dell Powerconnect 2608). Yes, I know, without jumbo frames the performance won't be nearly as good, but I got all of the hardware cheap, so isn't a big deal, and I do do very large file transfers regularly between my file server and desktop. I've also got a Linksys WRT54g right now that I want to setup as a WAP/switch, ignore it's routing capabilities. If I were to plug the WRT54g into my gigabit switch, and have my Xbox and wireless laptop running off of it, would it adversely effect the gigabit network? I know in wireless networking, having an 802.11b card hooked up to an 802.11b/g network will force all clients down to 802.11b- will the same happen here? Will my gigabit clients be forced down to 100mbit, or will they still run at gigabit speeds to each other, just not to the 100mbit clients?