Here's a couple: TV chat system - used to find (local?) people watching the same show you are watching and form a chat channel (on mobile phone?) Personalized

Here's a couple: TV chat system - used to find (local?) people watching the same show you are watching and form a chat channel (on mobile phone?) Personalized news site - kind of like YC or digg but using netflix style machine learning algorithms to customize A free version of 'vault.com' (reviews on employers, salary surveys) Find a haircut (paste your picture, sort of photoshop different hair on it) Underserved search terms: find some way to figure out what terms have a lot of search traffic but very few good results Easy quotes for local business (eg, find a plumber). Enter in "my pipe is broken" and get a bunch of emails with quotes. And one meta idea: a website for people to share startup ideas and form startups