If there isn't anything that will work via USB on the box:

 I am a BIG fan of Axis networked cameras, linux based, wired and wireless.  

I little spendy perhaps new/color, but you can find older stuff around on ebay or wherever.

Nicely done units.  IMO.  

Brian


> On http://www.pricewatch.com/ I thought that I saw some ethernet based
> webcams (presumably with bundled LINUX box running apache, but not sure)
> for about $85, U.S.
> 
> That might be a good option for you.
> 
> -- 
>   "I probably don't know what I'm talking about."  http://www.olib.org/~rkr/