Use your webcam as a security camera 
This was an article I came across on lifehacker, which pointed to the actual howto.
=== Lifehacker article: ===
http://lifehacker.com/software/security/use-your-webcam-as-a-security-camera-203905.php
=== The Simple Help guide: ===
http://www.simplehelp.net/2006/09/27/how-to-use-your-pc-and-webcam-as-a-motion-detecting-and-recording-security-camera/


If the link to the guide is down, try the attached PDF.

-- FredPettis - 15 Aug 2008

{{replaceme:Webcam_as_security_camera_guide.pdf" attachment''"Webcam_as_security_camera_guide.pdf|How to use your PC and Webcam as a motion-detecting and recording security camera}}