check out this one, basically you can bet that someone will put a cap in Obama:
US Presidential Election 2008 : Length of Presidency Tue, Nov 04, 2008 EST Rot # Length of Next US Presidency Moneyline
1 Replaced by Vice President Before 2012 Election +700
2 Replaced by Vice President After 2012 Election +500
3 President for 8 Years +200
4 Lose the 2012 Election Ev
Applies to US President elected in 2008. Wagers over $100 accepted by phone only.