My thoughts:
Clark should be the VP. He has experience, he's a 4 star general, he's from the South, and he's an eloquent speaker
Edwards will barnstorm the South; help us pick off states like: North Carolina, Arkansas, and give us a (much needed) extra boost in Florida.
Clark is the statesman; Edwards is the fiery orater who rallies the troops, and then serves as AG.
In 2012, a 58 year old Edwards will be our Presidential nominee with Rep. Harold Ford, 42, (D-TN),(probably, a senator by then) as VP.