SharePoint 2010 provides the business collaboration platform for developers to rapidly build solutions using familiar tools while leveraging a rich set of out of the box features. Visual Studio 2010 and SharePoint Designer 2010 make developers more productive and Visual Studio Team Foundation Server delivers support for application lifecycle management. Developers can integrate Line of Business data in SharePoint 2010 with read/write capability delivered by Business Connectivity Services. Sandboxed Solutions can be deployed to a shared hosting environment to limit the impact of unpredictable code to the other applications in use.
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Source : http://msdn.microsoft.com/en-us/gg620703