A very nice Visual Studio 2008 SP1 Add-in that you can find handy when developing with Silverlight 2.0 is the XAML Power Toys for WPF and Silverlight.
You can create a XAML business form by using a simple form that drives you step by step in selecting in creating your rows and columns.
You can also create a XAML business form based on a domain object in your project, and much more features.
If you are developing in Silverlight 2.0, it is a must to check this Add-in. XAML Power Toys for WPF and Silverlight 2.0 V 4.0
Hope this helps,