Since this thread is now part of the sticky Track FAQ, I thought I'd add a handy link to this thread where people are posting their alignment specs: http://www.m3post.com/forums/showthread.php?t=367003
OEM about -1.0
w/o pins ( and std springs) -1.3 to 1.6
Dinan -0.7 to above ( so -2.0)
Ground Control adjusts from -1.5 to -4.0
It seems like many, if not most, people posting in these threads get Ground Control camber plates along with a new coilover setup, but GC will work with OEM springs. I think the max negative camber you can get depends on whether you're doing camber plates with the OEM suspension. I have GC close to maxed out at -3.0 on ZCP stock.
FWIW, I feel this one change (camber plates for more negative camber up front) made such a huge improvement in track cornering and virtually eliminating understeer, I recommend it for anyone doing more than a couple of track events. And it can be a quite affordable solution that pays for itself quickly by saving you $$$ in tires.