Great read.
I believe its very telling that Thomas Scientific will not release its actual data. A job committee should do more research on a candidates scientific work and not rely on "impact factors." In fact, based on this paper, its unethical for them to do so.
Here is another website that lists current and past impact factors for almost all journals.
http://portal.isiknowledge.com/portal.cgi?DestApp=JCR&Func=FrameOmai