Doodle is the newest addition to The Best Sites For Creating Online Polls & Surveys.
Registration isn’t required, and it’s extremely easy to create a poll that can be embedded in a blog or website or be accessed via its url address. Participants can leave comments, too. It appears to have been set-up primarily to organize group events, but it can be used as a poll for just about anything.
The Make Use of blog has an extensive explanation of how it works, though it’s pretty darn simple.