The IFRAME code provided at first by ThePollTaker.com didn't include the needed height, but after a request from my twitter account @TheSurveyMentor on how to do it, the developer @SetSocialDotCom promptly wrote a new snippet to include enough height. As you can see in the window below, the poll now fits nicely within this Posertous hosted blog:

I appreciate this vendor's willigness to communicate with its users so quickly via Twitter. Thanks!