The new dialogs look really sweet. I wonder if you can control the source for the two navigation panes?
I run an application written with RadWPF on Citrix at a datacentre and we secure the folder structure with active directory but the standard MS dialogs show the full folder structure (all the users filesystem) of the Xen server then you get an access denied message when you try to browse directories you don't have access to. If there was scope to control what the is loaded as the source for the navigation it would make my software look better as the standard active directory denied loop always felt very clunky.
Cheers,