I’ve found this tool that acts a bit like the reflector of Lutz Roeders. The main difference is that instead of a treeview of the classes it gives you a full blown class diagram! To do Sacha Barber created AutoDiagrammer.

I’ve you are not ready to give up on Reflector, but still want to use this nice featuresset you will be happy to learn that there is an add-in of the autodiagrammer available for Reflector as well.