By the way... If you are into .NET development and use Visual Studio 2005/2008 you should give mole a try. It's a very nice debug visualizer for various datatypes. For instance you can easily navigate through the structure of a DataTable:
MoleVisualizer: Mole Visualizer for Visual Studio - Happy Debugging!
head over to http://karlshifflett.wordpress.com/mole-for-visual-studio/ and check it out!