Wow, congrats Will.
I believe you are the first person on the internet that has gotten an custom color on an E92 M3 in the US. In fact, you are the first person on the internet who has gotten a custom color on any BMW in the US since the E46 M3 as far as I am aware.
I wonder if something has changed for MY2009 to make this easier now? Either way prepare to be bombarded with requests on how to do this. Actually, I am tempted to have another look at the BMW color list now to see what's available.