Someone has alertly pointed out a mistake in the street photo tourney. Charles Traub appears twice, in polls #3 and #25. That was sloppy editing on my part. Unfortunately I can't change the poll once voting has begun. I've removed #25. I'd like to post a new matchup for Levitt. If you know of a photographer missing here that you think belongs, this is your chance. Write it in the comments. Anyone with multiple nominations will be considered to replace Traub at #25.
Addendum 5/4/10: Based on David Solomons' suggestion, I'm inserting Vivian Maier in poll #25 as a wildcard. Maybe it's premature to declare her an alltime great, but it will be fun to give her a shot. If you already voted in that poll you'll need to revote.