http://online.wsj.com/article/SB119612660573504716.html
Google is preparing a service that would let users store on its computers essentially all of the files they might keep on their personal-computer hard drives -- such as word-processing documents, digital music, video clips and images, say people familiar with the matter. The service could let users access their files via the Internet from different computers and mobile devices when they sign on with a password, and share them online with friends. It could be released as early as a few months from now, one of the people said.
Commentary:
There's probably going to be a lot of drama about this regarding a) privacy issues and b) copyright issues. Also, there's been services like Xdrive and others that failed along the way.
With that said, by creating an open platform for shared files and media for its HUGE installed user base, Google might be creating a huge traffic pool. Promotions and idea viralization within this space will probably follow the same lines and methods as other social media spaces.
The key is to create branded media that people would want to share and therby spread your brand/message.