Mark Shuttleworth Proposes Delaying next Ubuntu
Can you remember how you got it working?
Yes, I edited /etc/wpa_supplicant.conf with jed or emacs!
It wasn't hard at all (Did you try "man wpa_supplicant"?), but what you might be having trouble with is the driver for the wireless card. I had to use ndiswrapper to load the Broadcom driver from my Windoze XP partition. That requirement might(? I don't know) have gone away with the latest Linux kernel. Finding the driver directory on the Windoze partition, and especially the correct driver in that directory, was a bit of a pain, solved by using trial and error.
But all in all it's not much harder than properly setting up a wireless router.