Jeff has an extremely popular blog at CodingHorror.com where he discusses software development best practices. In addition, he is one of the masterminds behind StackOverflow and ServerFault, two very important websites for PowerShell hackers.
It should be a great interview, Jeff is a very dynamic speaker as you already know if you listen to the StackOverflow podcast.
P.S. Sorry for the schedule change, Thursday was blocked out by a higher power.