I just went to http://www.bing.com/ for the first time in ages. It seems to have achievements/medals in the top right (the 0/5 thing). That seems like a very unprofessional thing for a company like Microsoft?
It's the Bing Rewards logo. Not sure why it says 0/5, but if you have a bing rewards account it displays your points there.
Bing front-page: "This feature isn't available yet in your country or region"