www.whatdoestheinternetthink.net is a simple concept. You type a search term into the box provided, say the name of a shop, TV programme or car, and choose the search tools you want it to reference.
A full search will be more thorough but will take a good deal longer, then just click to find out what the internet thinks.
The site will look for mentions of the term in either a positive, negative or indifferent light - giving you an approximation of the internet's feelings on the subject.
You will get a percentage breakdown of positive, negative and neutral sentiment.