wifi drivers support for "n" standard

[Fbsd8]

I have 3 usb wifi sticks.
One supports b/g standard only and it configures with no problems.
The other 2 support the "n" standard for faster connection speed between 
the usb stick and the network AP.
These 2 usb wifi sticks do not configure no mater what I do.
Thinking the Freebsd wifi drivers have not been updated for "n" standard 
yet. My Cisco Linksys AE2500 USB wifi stick does not work with the bwi 
driver. Has any body gotten this device to work?