I am actually doing something similar with <a href="http://tawlk.com" rel="nofollow">http://tawlk.com</a><p>We also are about to release our comparison systems: <a href="https://s3.amazonaws.com/screenshots.angel.co/25/30340/0e187bdb92d4caf296131a1f5a512c71-original.jpg" rel="nofollow">https://s3.amazonaws.com/screenshots.angel.co/25/30340/0e187...</a><p>And our sentiment analysis engine is open source:<p><a href="http://github.com/Tawlk/synt" rel="nofollow">http://github.com/Tawlk/synt</a><p>We have released a lot of other open source code, and are also about to open up for more hiring :-)
Looks intriguing, although I don't know if Smirnoff deserves to be #2 for Vodka. It would be interesting to see how the sentiment analysis works and why influences the score.
Cool! Needs more categories: DSLR's, games, books, developer tools, etc., though I suppose you're limited by what people are tweet/facebook/gplus -ing.