New Wireless Card
I installed a new wireless card in my Ubuntu PC (D-Link WDA-1320). I had heard many of the D-link cards are linux-friendly. It was recognized immediately and started working. It even works with WPA security. The only hitch I had was that I had to turn on the SSID broadcast on my router to connect properly. I normally keep the broadcast off, so the router is hidden to outsiders. Hopefully the next version of Ubuntu (7.10, due out later this month) will fix this problem.