How interested is Florida Governor Charlie Crist in being John McCain's VP runningmate? So much so that veteran GOP dirty trickster Roger Stone -- who coordinated a few dirty stunts in support of Crist during the 2006 gubernatorial campaign -- is quietly peddling a so-called "Charlie Crist sex tape." That's what Stone called it during a telephone conversation. And no, it is not a tape of Crist having sex with a guy. In fact, it isn't even X-rated....