Microsoft has just released a tool suite that bolts on to Visual Studio 2012. The new Office Developer Tools for Visual Studio 2012 allow deeper control, integration, and app development and deployment options for Office 2013, SharePoint 2013, and cloud-based Office 365.
It's great news for internal development teams that create and maintain Office solutions within their organisations, but also paves the way for small, medium and large commercial software houses to develop and publish apps to the Microsoft Office Store.
Want to know more? Check out "Project Napa", where you can create apps for SharePoint and Office 2013 / 365 directly in your browser, with the option to drop them into Visual Studio 2012 later on, and keep on coding.