Today Yammer announced its acquisition of Scottish startup oneDrum, a cloud to desktop file syncing service that emphasizes Microsoft Office document collaboration.

Although a Yammer CEO David Sacks says that Box will continue to be an integration partner with Yammer, it’s hard not to see OneDrum as a competitor to companies like Box, Dropbox and Egynte. None the less, Sacks says: “We are not focused on becoming a content management system, we are focused on making content social. Yammer is a neutral social layer that allows customers to integrate with whichever content management solution they use.”

Earlier today Citrix announced its acquisition of Yammer competitor Podio. Citrix has its own file syncing service ShareFile, which is acquired last October.

As CIOs make plans to deploy tablets and other mobile devices, cloud syncing and collaboration are becoming integral to strategic decisions. As I’ve noted many times before, mobile is driving cloud even more than cost savings because cloud storage can take many pressures