- Google delays its secret social networking project
- Did Google buy Groupon for $2.5 billion over the weekend?
- Google rumored to be in talks to buy out Groupon
- Google personalizes local search with Hotpot
- Facebook Messages will have Office integration; should Gmail start getting worried?
- Facebook finds loophole in Google’s ban, rivalry escalates
- Facebook Deals creates rivals out of Foursquare and Groupon