Windows Live Quick Applications offer customizable out-of-the box solutions for specific Web scenarios. Each Quick App is built on Windows Live services and is offered as a source code download you can use right away.
e-Commerce: Retail
Retail uses Silverlight 2 and Silverlight Streaming to power an e-commerce site with product videos offering an engaging user interface.
Sports: Field Manager
Field Manager allows people who play sports to join a league and keep track of different sporting fields. It allows the "player" to keep up to date as to where the field is, if it is op
Search Visualization:Tafiti
Tafiti Search Visualization uses the Windows Live Services to provide a compelling search experience for users and allow them to share that experience with others.
Full Article - http://dev.live.com/quickapps/