I could see Lieberman as a VP candidate (again). He might be very socially liberal but surprisingly he's quite well respected by the RR because of his anti-pornography work, by Northern Republicans and by the base because of his stance on Iraq. Putting him on the ticket is no more implausible than putting HW on the ticket in 1980. A McCain-Lieberman ticket might be only ticket that could win 54%+ of the vote for the GOP and end the trend of '4th and Inches' elections.
http://thepoliticaltipster.wordpress.com/2007/12/17/is-this-the-moment-that-lieberman-changed-politics/