7. Angie’s List (ANGI) – Is it truly a social network? Sort of, but it does have an impact.
6. Zillow (Z) – Used by everyone looking for a house, or snooping on prices their neighbors paid.
5. Pandora (P) – Building a great brand.
4. Facebook (FB) – Only at the right price, and really very strong.
3. Yelp (YELP) – I think undervalued, especially as they begin to monazite Yelp in new ways.