Hi Swanny and All,
Congrats on the new toys. I'm looking forward to getting some ADK's in here and giving them a run. They are quickly getting a really good rap.
I think Craig is right on with his application of M/S on stage.
However, I have not been very psyched with my results using an M/S setup for anything further back than about 20 rows (ie. FOB). With one capsule covering the off axis information (ie. the S pointing at left and right sides of the room), recordings can become quite boomy and distant as you matrix the capsules to form a wide stereo image.
Of course, if you have mics that can do M/S and a pre-amp that supports it as well, it is really fun to experiment.
Happy Recording,
Marc