Social Graph API

Social Graph API is something to check out. Here is a blog from Google Code Blog. I haven't checked it out yet but plan to do so soon. I hope it does what it claims to do and does that well.

If you are wondering what this API does, here is a snippet from Google's blog entry.

we crawl the Web to find publicly declared relationships between people's accounts, just like Google crawls the Web for links between pages. But instead of returning links to HTML documents, the API returns JSON data structures representing the social relationships we discovered from all the XFN and FOAF. When a user signs up for your app, you can use the API to remind them who they've said they're friends with on other sites and ask them if they want to be friends on your new site.