I've been interested in the Free software home-security software called ZoneMinder for a while, but strictly as a lurker, checking out the project's site whenever I noticed it crawl down the Freshmeat home page. Joe Barr of NewsForge, though, recently had reason to install the software, which manages one or more home security cameras (which can be any Linux compatible camera -- he used some common D-Link wireless ones), watches for movement (generating alarms based on user configuration), and lets the camera output be streamed elsewhere, so a thief can't usefully just rip out the recording system. (NewsForge and Slashdot are both part of OSTG.)
http://slashdot.org/article.pl?sid=04/10/14/2315207