illini – Your point is well taken, but Obama is not running against Palin, and Palin is not running for President.
The position of Vice President, which Palin is running for, has very few constitutional duties. In fact, the only constitutional duty it carries, is being President of the United States Senate. (And even there, only votes in case of a tie.)
So between choosing an inexperienced President and an inexperienced VP, who only becomes President in an unlikely event, the choice is clear. (Additionally, between the two, Obama’s “experience” is only legislative while Palin’s is executive — more appropriate for a Presidency.)