So, you have a wireless or USB camera that hooks up to your computer, but how do you turn your computer into a home surveillance system? Here are a few software products that might suit your needs:

Odyssey WatchDog Pro 4 Channel Software -- Works with x-10 and USB cameras to turn your PC into a video surveillance system without the need to add any hardware.

If you're looking for a more sophisticated, comprehensive PC video surveillance system Milestone Systems is well-known for its XProtect Professional software systems. The most basic comes with support for one camera offering a "state-of-the-art" IP video surveillance system that records directly to your computer's harddrive, therefore eliminating the need for a VCR system. You can buy software from Milestone that supports all the way up to 64 cameras per server (probably more than the average home owner needs).