OpenSocial, a social networking site, will be launched by Google in two days.

OpenSocial is a set of APIs (Application Programming Interface) that developers can use to create applications for any network that chooses to participate. Google hopes that developers will now focus on more platforms when developing their applicationss than ever before. Hosts are the social networks participating, and include Orkut, Salesforce, LinkedIn, Ning, Hi5, Plaxo, Friendster, Viadeo and Oracle. Developers thus far are Flixster, iLike, RockYou and Slide.

Basically, OpenSocial will be Google's new social networking site that will serve as a portal to many other social networking communities.