+1.
I used to run an assortment of ath(4) or ral(4) cards in my WRAP.1e2
boards, but there always seems to be some niggling problem with them.
Not saying it didn't work, but each card failed in amusingly different
ways which was counter-intuitive of what I was trying to achieve with an
Open-BSD router.
For the cost / time of a stand-alone AP, I found it was just easier to
hang one off one of the board's ports. If it dies, plug a new one into
the port.
Getting back to the initial question though...
In terms of hardware, I've found the AR5212 based Atheros cards to be
the least overall trouble / best performance as far as output power and
rx sensitivity goes when it comes to comparing published spec vs real-world.
As for 802.11n, I can't really comment on it - never had the need / want
for it myself.
--
http://blog.sarlok.com/
Sometimes all the left hand needs to know is where the right hand is, so it knows where to point the blame.