If you're after something more than a quick yes/no poll (which is done well by Yarp, next down in the blog) then you might want to look at Flisti. Nothing to download, install or even join. Just ask your question, have as many answers as you like (with multiple responses if you prefer) and Flisti does the rest. You can also embed it into a webpage or blog:
You can also add comments as well. Seems nice and easy to use - doesn't seem to be a time limit either. Do feel free to answer the question as well - I'm just curious as to the result - I don't believe that I can see who responses came from since you don't have to register, but if I can, I won't be telling anyone.