Google has added the ability for Google Sites users to use Google Moderator.
"For example, if you have a restaurant site, you can embed Google Moderator on your suggestions page to get input from your restaurant patrons," explains Google Software Engineering Intern Eric Hysen.
Google provides steps for how to implement this here.
Google launched Moderator back in 2008 as a tool to help presenters prioritize questions for Q&A sessions. Since then, we've seen it in action a number of times, often from the company itself, but also in political settings, and other democratic-style events. Earlier this year, it was added to YouTube pages.
In May, Google launched the Google Moderator API, which means that developers can build tools around it.
Google recently added template themes to Google Sites.