In case you missed it Tuesday, Salesforce CEO announce a moved to files and documents (starts at 12:15 into the clip) by extending Chatter to become Chatterbox. Not much more today but to say it was an evolution of social networking. Benioff specifically mention Box as a competitor but I know others cloud-only vendors like SpringCM and traditional vendors like EMC and OpenText will also be watching the announcement next week. More to come next week. The big question to me is will this be a build or a buy.