First try at using a webcam. I hooked up a bluemic eyeball to my Mini and lost all sound output - itunes, mounted ipod, CD, no chirps or buzzes from the hard-drive. Followed Bluemic instructions re sound and ichat preferences. In preferences the sound bar shows activity when I make a noise, but no output. No other change. Have good video both ways, other end of chat can hear me. Unplugging the thing doesn't restore sound. I can follow instructions but don't know enough for more than basic troubleshooting - all plugged in proper, power on. Any guidance? thanks.