I'm going to be removing Windows from my dad's computer soon in place of some flavor of Linux (probably Gentoo since it's my favorite) and I need advice on shopping for wireless NIC cards. I'm going to need 2, one for my desktop machine and one for his (desktop) as well as a router. Admittedly, I don't know much about setting up a wireless network, but I need a model with solid support in Linux which won't be too much of a hassle to set up. I'd prefer personal experience so if someone could give me a quick run-down, I'd appreciate it. Thanks.

Will you be using 802.11a, b, or g?
For 802.11b, the Linksys Wireless USB adapter (WUSB11 v2.6) works great for me, you just have to write a few init scripts to load the driver with insmod, and so that you don't have to manually set the SSID/channel/encryption/etc everytime the computer starts.

I'm thinking of going with 802.11b.