Every day, millions of people share and engage with content online. But most sharing doesn’t happen on the site where it was published, it happens throughout the social web. Marketers and publishers are looking for a comprehensive view of all interactions with their content – on and off their site – and so we’re working hard to make this happen.

To enable our customers to discover who’s sharing, voting and bookmarking their content on the social web, cross-network measurement needs to become easier. So today we’re inviting social networks and platforms to integrate their activity streams with Google Analytics. Through these integrations, marketers and publishers will be able to discover off-site engagement, optimize their engagement within each social community, and measure the impact of each social channel and its associated digital investment.

Any network can integrate their streams – like +1, votes, and comments – into the Google Analytics social reports, which will be fully available next year to the many marketers, publishers, and websites that are using Google Analytics for free.

To make integration easy for social networks and platforms we’ve created a social data hub – it’s based on widely deployed, open web standards such as ActivityStreams and PubsubHubbub. A number of partners are already working with us to improve measurement of social actions – including Delicious, Digg, Diigo, Gigya, LiveFyre, ReadItLater, Reddit, TypePad, Vkontakte, and of course, Google+, Blogger and Google Groups.

via Google Analytics Blog: An invitation to social sites to integrate with Google Analytics.