I did a tour from Papillon that was pretty cool. We flew over Hoover dam, saw the sky walk from the air, and then landed on some Indian reservation in the Grand Canyon to have lunch. I did a quick search, but didn't see the same look of thier website as they spruced it up a bit.
A site I use to find things is:
Las Vegas - Play - Vegas Attractions & Activities
I thought the glider ride might be cool to do sometime. And the strip just introduced some kind of hot air balloon ride...not that I have looked into it...but I see it in the air on my way home from work.