I've been on the Santorum bandwagon ever since the election, and hope he does through some miracle get the GOP nod. The only problems are Palin and Huckabee, who take up most of what would be his base.
You forget some other problems:
1. President Obama. Slickest politician since at least JFK.
2. Election 2006. He couldn't win his home state when America was genuinely "moderate". In fact, he was absolutely crushed in the firmest defeat of an incumbent Senator since George McGovern.
3. As a GWB stooge, he will have a big handicap in 2012.