Interesting article last week by the swedish newspaper DI (Dagens Industri). They noticed the student entrepreneurs from KTH that have created BoRank.se.
They rank housing societies to make purchases of households more transparent. I love this idea since it makes complicated information accessible for everyone and in that sense revolutionize the market.
My idea: Could you apply this on other purchases? An app to value a car or second hand-items? Any ideas?