You've known it was coming, and today the doors to Microsoft's Office Store were flung wide open. In short, it's a newfangled portal that enables avid Office and SharePoint users to search for, discover and install apps. Users will need a Microsoft account and the preview version of Office, SharePoint or Exchange in order to start diving in. Naturally, Microsoft has built a pretty stout control system for administrators, and it has also crafted an internal distribution mechanism in SharePoint called the App Catalog -- a tool that "allows enterprises to build in-house apps or source them from partners and distribute them to employees within the organization." Looking to see what it's all around? Head over to the Store and click entirely too many of those "Try It" buttons.