Is 802.11n wireless supported

From PFSenseDocs

FreeBSD 7.0 and newer do have the framework to support 802.11n, however there are no drivers available for 802.11n cards at this time in any FreeBSD version including 8.0. We do not write drivers in FreeBSD and do not know when 802.11n drivers will be added.

Some b/g/n cards are supported, although only b/g are usable.