From Adam Schefter:

Chiefs scheduled to interview Packers OC Joe Philbin tonight, according to GB source. Chiefs already have had "several interviews" for HC.

If Philbin were to land the job, there is also a possibility the Chiefs could jump in the Matt Flynn sweepstakes, despite the presence of Matt Cassel and Kyle Orton. Philbin obviously wouldn't make that call but he could give Chiefs general manager Scott Pioli all the information he could ever need about the quarterback who is suddenly set to become the hottest prospect on the free agent market.