I got to handle one in the Bushmaster booth at the NRA exhibit hall. Yes, I'm gloatiing! The only thing better would have been trigger time with somebody else buying the ammo.
1) It really is a totally ambidextorus weapon with two charging handles.
2) The gentleman from Magpul who was in the Bushmaster booth was a joy to talk to and answered every question we had for him. He was proud of his "baby". I wish I could say the folks at FN or HK were as nice.
3) I thought the rifle would feel cheap but I was dead wrong. It was nicely balanced, lightweight and felt solid.
Bad news, it would not be available till early 09. I believe it was going to list for about $2K. I think I'll end up saving for one.