I already mentioned some of the things I overheard at DIDW 2008 and the panel titled Lessons From Successful Virtual Directory Deployments. I was looking at my notes today and wanted to float an idea that one of the panelists offered (I think it was Divya Sundaram of Motorola). He said (paraphrased):
If you front-end data (or a data store) that you don't own (or don't have control of), then you need to replicate/sync data (instead of virtualizing the view).Is that a good general litmus test for the Metadirectory vs. Virtual Directory debate?
As I've said numerous times, I can think of clear use-cases for both scenarios. But this might be a good general rule of thumb. BTW - the panel seemed to unanymously agree that both capabilties are useful and should be part of the toolbox.