ClickOnce - New Deployment Technology

ClickOnce provides a new deployment technology that gives you the best of a rich Windows-based application user experience and the deployment and maintenance benefits of Web applications. It allows a user to download and execute a rich client application over the Web, off a network file share, or from local media, and the app can subsequently be run offline. Check more @ http://www.msdn.microsoft.com/msdnmag/issues/04/05/ClickOnce/default.aspx