Think about it. What was Bush's political resume before 2000? Like it or not, he has permanently lowered the bar for presidential candidates (and this is not a slam against Obama, by the way).
I actively campaigned for Wes Clark in 2004 and I was furious with the treatment he got from the sluggish, pay-your-dues, stand-in-line Democratic partisans. This inertia is endemic to the party and it's how we got stuck with Kerry as a candidate, and that's how we'll keep getting stuck with well-entrenched party hacks who LOSE presidential elections.
Do you think Republicans diddled around and debated the party purity and experience of Bush pre-2000? Hell no. They snatched him up, embraced him and made him their candidate. We MUST do the same with Obama if we want to win. If you want to navel-gaze and discuss whether or not Obama is "seasoned" enough to run, see you later--I'll be working to draft him for president.