Skydrive no longer exists, due to a lawsuit, Microsoft changed the name (about a year ago now) to OneDrive. Any Skydrive tutorials need to be renamed, and probably updated.
Yammer integrates with SharePoint and Office 365. Please look into training on this tool along with aspects and advantages of using enterprise social networking and cross collaboration with external groups.
We just implemented Office 365 and Lync, and I'm searching for learning resources. There are many online, but I would love to refer employees and students to Atomic Learning for this. I saw one brief clip on Lync within the Office 365 series. Would love to have a dedicated series just focused on all the Lync features. Thanks