Former colleague Lori Cates Hand continues doing a great job with her Publishing Careers blog. In a recent post she interviews Steve Ganz, an executive recruiter who specializes in educational publishing. In addition to shedding light on the recruiting process Ganz also provides a great list of websites for entry-level candidates.
Btw, although I don't work in the higher-ed side, I agree with Ganz's point about sales reps becoming acq editors. It's a natural next step, especially in the higher-ed publishing sector. We don't see it so much in the computer book space, although I've hired a number of new acq editors in the past who had a strong sales background; they typically sold technology products though, not books.