All the drivers for webcams are in the kernel.
If it works on that kernel, then chances are it will work on a different architecture running the same kernel version except for that architecture.
I have plans for a baby cam for my Pi when it comes. Chew even less power than what I'm using as my baby cam now, and hopefully will run better, but with around the same cpu grunt as my current one I'll need to wait to get one before I can find out.
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WiFi Issues ? Have a look at this post ! http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=44044