I received some Proxim Gold Orinoco B/G Pccard to test for wireless assessments, at first i try the card in my Ubuntu Dapper but it didn't worked. I read some how-to's but they recommended to use ndiswrapper, the problem of ndiswrapper is that don't support monitor mode :( .
Then i found Madwifi a Linux kernel device driver for Wireless LAN chipsets from Atheros, the Proxim card is based on atheros, cool. I downloaded and compiled the new version of the driver, the "ng" branch; all was ok, but when i tried to pass to Monitor mode it didn't worked. I tried some tips on some forums but no way..
I decided to install the old version of madwifi drivers, compiled them, try them, and all went OK!
So if you have a Proxim Gold card, i recommend to use the madwifi old version.