I recently left one AV manufacturer, searched around and joined a different manufacturer. My first stop was CEPro where I did not find a ton of listings but highly relevant ones.
If you are looking to fill a position with a salary of $100k or more, check out The Ladders.
If you are looking for programmers, check out CyberCoders, mixed results from a job hunting perspective but as an employer YMMV.
Crestron Yahoo Group, IntegrationPros are also great hangouts to post to, I never had luck with posting a job at AVS though.
How did I end up at VUDU? Of course I had heard of them and kept close eyes on the company since they launched but it was LinkedIN where I made my connection. Rather than post a job ad, many are finding success with pro-actively emailing prospects on linkedIN.
While on the subject, make sure whatever job ad you post for a technical position doesn’t contain a laundry list of required technologies and tech-buzz words that no one person could possibly possess, it annoys people and may scare of some potential star-employees.
By the way, CEDIA Expo is just around the corner, talk about a target audience!!