One Click Collaboration: Forums
It is worth mentioning that forums are one of the oldest forms of communicating online and one of the most powerful passive expressions of collaboration on the market. There are countless forums on topics, and one could argue that comments and tweeting are a form of forum! What if you brought it all together with your Facebook account, Gmail account etc. and were able to have a collaborative forum within seconds on anything?
Tal.ki has the solution. Here it is in action, definitely worth looking at!