The placeholder text for 'your review' contains "Search for review eg. Tom Cruise" which is the same as the actual search field.
Perhaps you should change the text to 'lively, beautiful etc'
Theres a D3 word cloud example here - http://www.jasondavies.com/wordcloud
Perhaps you could also change the layout style for the words to make it look more interesting ;)
Otherwise looking good :D
1. There is not much user input validation, if any. For example, I submitted <h1>Broken</h1> to the San Francisco page, and it broke the "Explore Review Frequencies" section.
2. There is no checking for repeating submissions. Using a while loop on "send_review('stuff')" repeated my submission until I refreshed the page. A way to fix this would be to save an array of user ids per topic, but unfortunately that would require user login. Or, you could save an array of ip addresses, though obviously there are easy ways to get around that.
