Could you please share how you solved you problem with us. At least post the link to the website that helped you.
You might want to consider starting a new thread in the Networking forum. Have you checked to see if the wifi chipset is even supported? Also, check the FreeBSD handbook and the forums there as there was a major rewrite of the wireless setup in v8.0.
Webcams are very hit and miss, however, I did run across something about them here, FreeBSD webcam support: video4bsd
, that might be of interest. You could also google webcam and freebsd.