If you did not get to attend IWCE, here are the presentations I used:
Fixed Wireless Infrastructure for Security and Surveillance
(From IWCE session: Wireless Video Surveillance 101)
Mobile Real-time Video Surveillance
(From IWCE session: Wireless Killer Apps)
Also, check out my blog post with notes from Wireless Surveillance 101 session: The Many Interpretations of Wireless Mesh. You may also find useful a presentation on Video Surveillance Trends and Basics by Steve Surfaro of Axis Communications, who was also part of Wireless Surveillance 101 workshop: download 20 MB Google Docs PPT file.