cool! I've actually wanted to build a wheelset so the IRO option is looking really good right now. I read a few threads about the coldfusions and apparently they're the same thing as velocity fusions like you say. My friend also told me that it comes in a Velocity box.
I Figured that it would obviously be cheaper to make my own but I didn't know it would be 150$ for double butted too since i was too much of a lazy ass to do the math.
Also, yeah I suppose my forum search for velomine wasn't comprehensive enough, my mistake.