Very interested in this concept, but I'm still trying to get my head around merged mining. (I actually found this thread by Googling "scrypt merged mining")

Is it that you can find USC blocks independently, but they're linked to/secured by the parent chain? IOW, you don't need to win a block on the parent chain to get USC?

If this is the case, then you'd be mad not to merge mine... although it does sound a little fiddly for early adopters. I've read this thread through once, will have to do it again later I think.