I think that having a poll on your website is a good way to get your readers and visitors involved in your website with little to no effort on both of your parts. That is why I think that Twiigs is a good place to set up polls. You don't have to do anything except put your questions and answers in, put the code in your website where you want it! That's it!
I agree that polls are a good way to get visitors to interact and become more interested in your site.
Haven't used Twiigs before, but I'll definately check them out.
