Three full application samples have been available at code.msdn.microsoft.com for about 3 months now.
Posting this so that everyone knows of these invaluable resources.
Platform Program Manager
Microsoft® Surface® Live Stream Code Sample
Live Stream enables businesses to engage their customers face-to-face using the most recent and relevant Twitter™, Flickr®, and RSS newsfeeds. Community generated photos, tweets, and stories float across the Microsoft Surface display so that several people can touch and share interesting content with one another. People can flip the content over to generate a Microsoft Tag, and then use their phones to scan it and go straight to the source in their mobile web browser. From there they can further explore the content or jump into the conversation.
Surface administrators can quickly reveal a hidden status panel by placing down a tag on the screen. At a glance, the panel indicates service connectivity, adjusts flow speed and direction, controls the volume, and provides a very quick way to remove inappropriate content and accounts – all without having to leave the application or interrupt the experience.
This code sample is highly customizable and extensible. In minutes an administrator can quickly re-skin the interface and branding elements making it ready for deployment at any business or enterprise. With a little more time, Twitter, Flickr, and newsfeed integration can be expanded to other services or pointed directly at a new feed by extending it with custom code. Additionally, developers can use the code in any number of completely new or existing Surface applications.
Live Stream demonstrates an elegant, simplified, interface designed for touch from the ground up, and based on the Metro design language. It is a great reference for those interested in advanced touch application design.
Download the Live Stream Code Sample – http://code.msdn.microsoft.com/Surface-Live-Stream-Code-1b896177
Microsoft® Surface® Financial Services Code Sample
The Microsoft® Surface® Financial Services Sample Application shows retail bankers and customers working together exploring service options and wise monetary investments. Brochures and other objects interact with the screen to reveal customizable graphs, videos, and information specifically related to individual needs.
The release of the Microsoft Surface Financial Services Code Sample, based on the aforementioned sample application, helps developers build upon and customize these experiences. Developers can now use the code to finish their own banking application or use it to springboard completely new application experiences.
The code sample demonstrates how 360° multiuser interaction and object recognition, like tags and blob size, enhances peoples’ enjoyment and understanding of products and services. Developers creating retail, hospitality, entertainment, and education experiences may find this code sample especially useful. Assets for creating tokens and mailers used with the code sample are also provided.
Note: The code sample defaults to British pounds (GBP) and can be set to USD via configuration file.
Video of the Financial Services Code Sample can be viewed here: https://www.youtube.com/watch?v=tz6LlSShH2Y
Download the Financial Services Code Sample – http://code.msdn.microsoft.com/Surface-Financial-Code-12ab2499
Microsoft® Surface® Bluetooth Connect Code Sample
This code sample can help to develop Microsoft® Surface® applications that can send content to Bluetooth equipped mobile devices that utilize the Object Exchange Protocol (OBEX) – without the need for a client-side application.
The sample demonstrates sharing pictures, contacts and ringtones to a Bluetooth enabled mobile phone; but the possibilities are endless. Use this sample to enhance assisted sales, gaming, education, and communication scenarios.
This code sample is designed for use with the Microsoft Surface 1.0 SP1 SDK and makes use of the .NET Bluetooth library binary file available from http://32feet.net/default.aspx – it is provided "as-is" and is not supported.
Video of a project based on the code sample is available here: https://www.youtube.com/watch?v=-gW7j32tqYA
Download the Bluetooth Connect Code Sample – http://code.msdn.microsoft.com/Surface-Bluetooth-Connect-570fa881