The updated training kit comes with lots of bug fixes and couple of new labs too. The team also have made the labs work with real phones not just the emulator. Here is the description from Windows Phone developer blog on the two new labs added.
Accessing Windows Phone 7 Devices is a lab that lets you work with the phoneâ€™s camera and location services. The Windows Phone 7 is equipped with a Camera and GPS (global positioning system). Developers can leverage these devices to build location-aware applications and take live photos. The lab walks you through the steps required to integrate your applications with the phoneâ€™s camera. The goal is to build an application that lets you capture pictures, give them a title, and save them to the application local store. The lab also gives you the option to â€œfakeâ€ locations and, when saving a picture to a local store, associate its latitude-longitude (lat-long) geo-coordinates, and create a view in which you can see the pictures on a map.
Multi-touch Game Development with XNA Framework is part of the complete (and amazing) XNA tutorial on App Hub.
The lab introduces you to multi-touch enabled game development on Windows Phone 7 using XNA Game Studio, the Windows Phone Developer tools and Visual Studio 2010. During the lab, you will build a simple 2D game using XNA Game Studio. Playing the game requires the user to supply multi-touch input; this lab will show you how to support these inputs while making sure that the game reacts to them as the user would expect.