I'm a little late to this thread but will add:
I decided to see if I could get the mic on my MS LifeCam hd3000 working.
I have 2 rpi computers setup with medium overclock (700-900mhz). I grab the sound off my outdoor aviary webcam (rpi1) and pipe it to the indoor rpi2 using this syntax on rpi1:
arecord -D plughw:1,0 -f cd | ssh -C root@rpi2 aplay -f cd
I could also use "-f dat" for better quality sound, but that uses more cpu resource to transmit more data.
I also had to play with alsamixer to set the input volume of the microphone on the rpi1 webcam. Too high and there may be too much noise, too low and the cheap PC amplified speaker on rpi2 may not have enough to work with. Luckily, one can hear in almost real-time changes made with alsamixer. There's about a 1 second delay as the sound data traverses the wireless network connections of the rpi computers. The "record level" can also affect cpu resources as a higher record setting sends more data over the network. One must find a sweet spot in all the settings to avoid network sound drops.
I watch the aviary from any computer on the home network with Firefox and have gotten used to mentally adjusting the 1 second audio delay combined with the 4 second delay of Motion running on rpi1 aviary computer.
While the actual arecord command on rpi1 doesn't take much cpu resource, the ssh command used to pipe the data to rpi2 uses 30+% of cpu resource, and motion can take even more depending if it's making a video of motion in the foreground or running its webserver. Sometimes Motion gets confused and quits or partially quits and has to be stopped and restarted. I had to rebuild the Sandisk C-4 8G SD card this morning due to corruption last night. First time that's happened in the 2 weeks I've been playing with audio.
The mic is unusually sensitive. I can hear birds and dogs in the neighborhood, airplanes flying overhead, modified exhaust motorcycles 3 blocks away, neighbors mowing the lawn, as well as the burbling budgies in the aviary
I haven't figured a way to hear the sound from a Win7 PC without some serious custom software on the Win7 PC (emulating linux alsa commands?).