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.
I am actually doing something similar with http://tawlk.com
We also are about to release our comparison systems: https://s3.amazonaws.com/screenshots.angel.co/25/30340/0e187...
And our sentiment analysis engine is open source:
http://github.com/Tawlk/synt
We have released a lot of other open source code, and are also about to open up for more hiring :-)