What’s that in the air? A bird? A plane? No, it’s SharePointpalooza. Our month long focus on SharePoint’s evolution continued this week with a few looks at the SharePoint Yammer conundrum and a question about how a changing user demographic could shape SharePoint’s future. Our contributors also offered insights into how the customer voice is shaping marketing and told us that if you think mobile is all about usability, it’s time to change your assumptions. Read on.