You can now write Less Wrong comments that contain polls! John Simon picked up and finished some code I had written back in 2010 but never finished, and our admins Wesley Moore and Matt Fallshaw have deployed it. You can use it right now, so let's give it some testing here in this thread.
The polls work through the existing Markdown comment formatting, similar to the syntax used for links. Full documentation is in the wiki; the short version is that you can write comments like this:
What is your favorite color? [poll]{Red}{Green}{Blue}{Other}
How long has it been your favorite color, in years? [poll:number]
Red is a nice color [poll:Agree....Disagree]
Will your favorite color change? [poll:probability]
To see the results of the poll, you have to vote (you can leave questions blank if you want). The results include a link to the raw poll data, including the usernames of people who submitted votes with the "Vote anonymously" box unchecked. After you submit the comment, if you go back and edit your comment all those poll tags will have turned into [pollid:123]. You can edit the rest of the comment without resetting the poll, but you can't change the options.
It works right now, but it's also new and could be buggy. Let's give it some testing; what have you always wanted to know about Less Wrongers?
This is the sample poll from the article (just a straight copy-paste). These aren't exciting questions, so you should ask some that are!
What is your favorite color? [pollid:2]
How long has it been your favorite color, in years? [pollid:3]
Red is a nice color [pollid:4]
Will your favorite color change? [pollid:5]
I got an error the first time because I put a percent instead of a fractional probability. Upon correcting this, I now see the following erroneous result: http://imgur.com/IASqy