Using the AJAX control toolkit and Infragistics combined seems to be a good solution for me since I was already getting used to the AJAX Control Toolkit.  However, I'm having some issues with the webdialogwindow.

 I use an autocomplete extender and calendar extender inside of a webdialogwindow.  When these controls expand, they are taller than the height of the webdialogwindow and they get clipped at the bottom.  I believe it has to do with the webdialogwindow hiding the overflow in the main div container, but I don't know how to change that property.  Anyone have any tips?