Windows Live provides unique opportunities for developers from hobbyists to large ISVs to build social networking applications on top of the largest contact and address book database on the Internet. Developers can build these applications utilizing Windows Live services such as instant messaging, search, location based mapping, blogging, gadgets, and others. These can be AJAX style Web applications, run within Messenger or other rich applications. The Windows Live Platform provides several business models based on revenue sharing and paid placement. Brian Arbogast, Vice President of the Windows Live Platform, discusses and demonstrates the latest developments of the Windows Live platform. David Berlind, noted journalist and organizer of the recent Mashup Camp conference, leads an interactive discussion with Brian and the audience to dig deeper into the offerings of the Windows Live platform, and the revenue opportunities you can realize by building applications on the Windows Live.