Whenever one has elections one has maps! The Politico has a flash map which shows results by county meanwhile Google (does it strike anyone odd that a search engine is now a leader in geography?) has a map showing county results.
On the Republican side Huckabee won big. Romney manged to win the Sioux City-Council Bluffs corridor and the more populous, industrial Mississippi River coast area.
For the Democrats Edwards won the blue farmers (populists who love their farm subsidies) in the south, Obama won the more youthful votes in the east, and Clinton pulled away the suburban west and north.