If you have not done so yet, go check out the Gotham Gazette's
Campaign 2005 - Mayoral Candidates: Grid.
Chockfull of information it really is a fast way to check where the candidates stand and compare in issues such as immigrant voting rights, the smoking ban, city finances, anti-terror plans and civil rights.
I hope they do the same next time with all major electoral positions in the city. This would be an amazing resource to have in the future.