Where is the best places to find faculty job postings in physics? I'm currently a postdoc interested in finding a tenure track faculty position. What are the best places to find job postings for such positions?

Seeing as this might be a very context/field dependent question, I am specifically looking for appointments in physics departments (preferably in the US).
If you're a member of the American Physical Society (APS), I would recommend looking there first (http://www.aps.org/careers/employment/index.cfm). Many universities will post here, as it's the official representative of physicists in the United States.

In addition, I recommend looking at university department webpages. If there is a certain region or state you'd like to work in, narrow your search to universities there.