@ktims:
The necessary software is included (wpa_supplicant, I think, the driver should be there..), but I don't think there's any UI for this. You'll have to hack it in yourself. First create a wpa_supplicant.conf file for your network and test it on your network manually in the pfSense console. Once you've got that working, put it somewhere where it won't get overwritten. Then add the command to start wpa_supplicant as a shellcmd in the xml config file (search the forum) and it should come up automagically.
Oh, i have wpa_supplicant, nice :) Problem is now, that it doesnt have wired driver :S I'll have figure out how to install it… any help there? :)
cheers!