It's not on the list because it's new. I'm pretty sure it's compatible though. I've posted this question on the Asus forums and they've never said anything about the ram not being compatible.
I RMA'd the Mobo and may do the same with the RAM. The interesting things was that when I fired up each stick and the one that didn't work, I got a "Locked" display on the Asus digital Tweakit. I looked this up and it didn't mention anything about RAM causing the "lockup" so I'm think the RAM may be ok. Oh and the fact that Buy.com says it could take 3 weeks to process my return, so fingers crossed the RAM is ok LOL!