Along with Masa from NYC as well...
They're both opening restaurants at Aria, one of the hotels part of the monstrous CityCenter project, slated to be open late 2009.
Masa's doing a split concept of both his Bar Masa restaurant as well as a shabu shabu (called "Shaboo") restaurant.
Shawn McClain, in addition to doing an event for the James Beard Taste of America event in Vegas October 24-26, will be opening Sage at Aria, which will be seafood-centric, but presumably with the same style and grace that McClain provides in his Chicago restaurants.
Looking forward to those... as well as all the other new restaurants opening in Vegas soon. Will keep you posted as I know more!