I've been playing with a bunch of wireless stuff recently, and I've found out it rocks. I have a Lucent Orinoco (WaveLan) card that works beautifully under both Win2k and Linux; and I have a Raylink card on the way as well. I've set up an 802.11b network in my house as well - it is so cool to be able to walk around with my laptop, hack, and surf at the same time.
I've also been playing with the Breezecom (Alverion now) equipment, which is the reason I bought the Raylink card. Hopefully that will interoperate with them. We'll see. Anyway, I recommend anyone to play with this stuff. It rules.