>If I got one of these cards http://www.trendnet.com/products/TEW-228PI.htm would it work with
It uses the rtl8180 chipset, which you may find challenging to use with
You've got a couple options. "Project Evil" (FreeBSD for
"ndiswrapper") has reported some success:
Also, netbsd has a driver for the rtl8180, which uses net80211, though
the version of net80211 is quite stale (May 04). When last I spoke to
David Young (the committer) about updating same, he said he would, then
distracted by other things.
Finally, the rtl8181 sourceforge project has a linux driver that also
uses (a more up to date version of)
the net80211 framework, which you might port to FreeBSD.
Since it appears you've not purchased the card yet, you might consider a
Prism2/2.5 or Atheros card, since these will plug-n-play (Atheros
requires a fairly recent beta version of m0n0wall.)