When designing your social interfaces, ask yourself what social objects belong in the architecture and how you are going to support them. What activities are you going to make possible to enable people to engage with each other around these social objects?
People will share what they find or have collected, and will display those collections for others see, envy, and borrow. Eventually they have conversations around them.
The user wants to leave an opinion or evaluation about an object, person, place or thing.