Online social networks

I created myself a Facebook account a couple of days ago. I had previous experiences with social networks like Orkut and Hi5, but I was not impressed by what you could do in these networks. What makes Facebook different is the range of applications that you can deploy on your profile. The number of Facebook applications grew since they provided an API so that anybody can write such an application. Meanwhile Google released an API (OpenSocial) that will let you write an application deployable on any network that agrees to support this API (and a lot of them do, except guess who? Facebook). Let's see where this will take the online social networking buzz.