I've heard from within the industry that Kenda will be adding their name to a few (possibly 3) 27.5" MTB tires for 2008. They had nothing at their booth at Interbike, but a VERY reliable source offered this info to me.
Also, MTBR posters have mention KORE to be rolling rims with a 584 bead seat. One more option for us. Look like this won't be pushed aside for years like the 29er movement!
Start emailing your favorite component and bike manufacturers requesting 27.5" stuffs !!!