I own a Microsoft LifeCam VX-1000 webcam, which is nothing special, but absolutely okay for its price. The only thing that bothered me is that the driver is not available as a standalone download: You need to download a 50MB installer, which then downloads another 150MB: DirectX, the .NET framework and other components required for the (useless) software. Without network connection, you cannot install the driver. Also, (of course) you're forced to install the software, too.
So, I extracted the driver files from the setup. The ZIP file includes drivers for the NX-6000, the VX-1000, VX-3000 and VX-6000. They're working fine without the software.
On some Win7 installations, an installer will open and try to download the software, but you can safely cancel the dialog.
Update 20.04.2010: Win7 drivers from v3.20.