But in general, I'm not sure what the advantage of posting a poll into the comm would be.

I agree. And as a mod, I would rather not have to be too concerned about the content of the polls themselves, which is easier if the polls are elsewhere.

Would you be interested in being a mod of polls? I really don't think it will involve much moderation, but it seems better to have more than one mod, in case I'm hit by a bus or something.