Google prepares a new service called Google Mine. It’s integrated with Google+ and it’s a way to keep track of the items you own or you’d like to have and share some of them with your circles. At present, the service is tested internally at Google.
“Google Mine lets you share with your friends and you can keep the information up to date with what your friends are sharing. It enables you to control which of your Google+ Circles you share an item with. Also you can rate and review the items, upload photos of them and share updates on the Google+ Stream where your friends get to see and comment on them.”