Yes, I think the threads should be combined.
After making my previous post, I spoke with a retailer in the Boston area and they informed me that HIE is being phased out a la what SilverPrint has already reported.
My source isn't a mole at Kodak - just somebody working a film sales counter in a good-sized photographic supply store. They aren't particularly significant in the analog world but they were big enough to be given fair warning when AgfaPhoto USA went belly-up in 2005.
I'll have the opportunity to speak to more reps from this retailer at the "Photographica" show this weekend in Wakefield, MA.
I really do hope that information I've been given is wrong.