As I am preparing a talk on the new cool ways to build Silverlight applications in VS2010, I installed the Microsoft Silverlight 4 Tools for Visual Studio 2010 Beta 2.

These tools contain the 'Silverlight Business Application' project template so you can quickly setup a business application in Silverlight with RIA services. After installing the tools (and installing it again...) the project template isn't there.. WTF ?!?!

As always I used the 'Google is your friend'-pattern and found the solution: if you have installed previous versions of RIA services (i.e. for Visual Studio 2008) the installer internally crashes and doesn't install the templates. The solution is to remove all previous versions of RIA services and install the SL 4 tools again.

You can read more here.