ahh brings back good memories. I'd recommend a visit to vegas to anyone, its just so bonkers, and the bikings good too.
Go at the end of september and you'll catch the interbike show and all the cycling glitz that goes with it, the trail areas to go for are Boulder and Cottonwood/Bluediamond both 30 mins from the strip.
see our photos from the biking here from a few years back
http://numplumz.fotopic.net/c339011.html