Has anyone skiied these yet? My 1997 (or so) Atomic ARCs are getting a
bit old and I'm debating buying these new ones, or picking up some
clearance 05/06 RS:11s.

Here's a couple articles on them:

http://www.engineeredtuning.net/NewAtomic.htm
http://www.skinnyski.com/gear/display.asp?Id=4762