Its not much but it was the first thing I found:
http://www.psu.com/Half-Life-2--Orange-Box-will-arrive-a-few-weeks-late-News--a1093-p0.php
This article indicates updates are coming from valve on PS3 related Orange Box developments. That at the very least tells me that EA is not the primary Developer.
Also Gametrailers is listing EA as the publisher which is where I think I had that idea to begin with.
I don't think I am going to find anything more than that though, probably just other versions of this type of info.