A report from Microsoft on Active Directory vs. "Databases" (my quotations).
Kind of shocking that Microsoft claims their database technology is not good for searching or reading data! (Unfortunately this I believe to be generally true about *most* so called "relational" database technology. Most R&D dollars *have* been put into making them writable as opposed to searchable!)
Also pointed out, and I believe true generally, is that database technology is not very good at replication or distribution! (With either loose or strict consistency.)
Aside --- so what does this predict for WinFS? Either WinFS will suck as bad as today's databases or SQL Server will benefit from all the improvements driven by WinFS.
And in a related note from Gregor Holpe on integration styles...