Thats a great idea. Twitter can be a good source of seed content. Thanks for suggesting.

Not much presently. Its just restricted to the bar chart. Infact that is mostly another form of visualisation of the content. There isnt much content presently for doing sentiment analysis where you could show a goodness meter for something based on the words being submitted as reviews. I am not finding much time to work on new features between collecting seed content, finding users, getting feedback, etc. Of course, that cannot be an excuse for not getting the features done. Infact there are lots of other items in the pipeline that need to be done - eg. spell check, more general search - presently its mostly exact match with some help from autocomplete, social integration, chat, etc.