if you have a spare computer and webcam, then you can use something like
yawcam for windows to make it stream over your network, and with some additional setup - over the internet.
720p webcams like the Logitech 9000 or Microsoft 5000 see things in lower light conditions that the older vga sensors / cameras can't even pick up.
If you don't mind setting up the spare computer with linux, then you'll have more options to set up streaming audio and you can really into it
as detailed here.