http://www.thewashingtonnote.com/archives/2008/11/scoop_mccain_an/

Obama and McCain Teams Worked on Appointee List Together
November 25th, 2008

Via: Washington Note:

A senior Obama campaign official shared with The Washington Note that in July 2008, the McCain and Obama camps began to work secretly behind the scenes to assemble large rosters of potential personnel for the administration that only one of the candidates would lead.

Lists comprised of Democrats and Republicans were assembled, sorted into areas of policy expertise, so that the roster could be called on after the election by either the Obama or McCain transition teams.