Charlottesville Tomorrow made use of Google Moderator during our 2011 local elections.  We asked the public to submit and vote on questions for the candidate forums we co-hosted with our newspaper partner.  Before each forum, we just printed the questions (low tech) and gave them to the moderator on strips of paper with the number of votes each question received (i.e. good question responses).  Many of these questions were then selected and used in the candidate forum.  Here are some links to the pages where this was done:

Election page which shows Google Moderator embedded on our site:
http://cvilletomorrow.typepad.com/elections/

Our main election page is here:
http://cvilletomorrow.typepad.com/charlottesville_tomorrow_/elections2011.html
but we are no longer linking from there to the Google Moderator pages.

Direct links to Google Moderator pages
http://www.google.com/moderator/#16/e=b7ac6
http://www.google.com/moderator/#16/e=bceb3
http://www.google.com/moderator/#16/e=b8710