Ok, I have a SMC EZ Connect 802.11g usb adapter.
It works, I can connect to the internet with it but I seem to have some problems when using some Backtrack tools, for example:
Nmap.
If I try to scan a random ip with nmap I get ports "filtered" (wireless usb) and when I scan the same IP from my wireless card I get ports "opened" , "closed" , "filtered".
The second thing is ssh.
I can't connect to any ssh with my wireless usb. But with my wireless card it works.
Any ideeas ?