CADPAT was adopted before MARPAT. That is a fact.
UCP, the pattern fround on the ACU, was derived from MARPAT, in a palette of colors that would be universal for most battlefield environments and allow for a single uniform.
MultiCam was developed by Caleb Crye, with funding from Natick, for the Army's Future Force Warrior program. This pattern is now being adopted by all soldiers in the OEF theater of operations only, for now.
There is alot of misinformation in this thread. The above should clear that up.
Do not post information that you do not have first hand, empirical knowledge of.