Al Gore

Al Gore spoke passionately and effectively about the state of the nation and global warming. Although he is a super delegate he feels that he has made the correct decision not to commit to either candidate. From his statements I would guess that he would like to support Obama but still has to remain loyal to Clinton.
Winning the election is vital. There must be a rollback of the unconstitutional and un American policies of this administration. Most important is to change the policy of torture.
Winning the post election politics will also be difficult. The right wing media and blogs will fight to keep the status quo. Concentration of corporate power is particularly noticeable in TV.
He is deeply involved in policy discussions, particularly involving energy. It was a bit disconcerting however that he used the quote that there 100 square miles of solar panels could supply US electrical demand, but did not have a guesstimate about the cost and how to build it.

Howard Dean says that the most effect thing that one can do to contribute to the campaign is to go door to door. Personal contact is most effective.