Dedicated Admin Connection (DAC) is one of the highly touted features introduced in SQL Server 2005. Now that it has been around for a few years, I wonder how it is actually being used or whether it's being used at all in the real world.
I have not run into any real production scenarios where I'm forced to use DAC. But that may just be due to my own narrow exposure to SQL Server problems. If you have used it to solve real problems (not just for testing or folling around), I'd very much like to know what kind of problems they were.