I heard they got rid of the roller coaster, but im not sure about the others
Yes, their rollercoaster (it was called the High Roller) which sat upon the top of the Stratosphere Tower was removed in 2005. They only removed that coaster because it took up a lot of room on the tower, and low guest satisfaction numbers. In place of where the High Roller used to be, they put up a few flat rides that were more thrilling in its kind. You can find pictures and info on the High Roller here: http://rcdb.com/id141.htm
The rides that replaced High Roller as of follows:
X-Scream – A giant teeter-totter that propels you 27 feet over the edge of the Tower, 866 feet above the ground.
Insanity, the Ride – A massive mechanical arm extends 64 feet over the edge of the Tower and spins you at a force of 3 Gs for a truly mind-bending experience.
You can find more info on those rides and stats from their official site: http://www.stratospherehotel.com/thrills/
Oh and by the way, the High Roller was the only ride removed.
Hope that helped! 
Phoenix July 3, 2008 at 11:55 am
roller coaster gone, they replaced it with 3 smaller rides, which are all running.
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jaymiejewel July 3, 2008 at 12:02 pm
Yeah, their gone =( but they got replaced by some smaller rides
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Kevboy July 3, 2008 at 12:40 pm
Yes, their rollercoaster (it was called the High Roller) which sat upon the top of the Stratosphere Tower was removed in 2005. They only removed that coaster because it took up a lot of room on the tower, and low guest satisfaction numbers. In place of where the High Roller used to be, they put up a few flat rides that were more thrilling in its kind. You can find pictures and info on the High Roller here: http://rcdb.com/id141.htm
The rides that replaced High Roller as of follows:
X-Scream – A giant teeter-totter that propels you 27 feet over the edge of the Tower, 866 feet above the ground.
Insanity, the Ride – A massive mechanical arm extends 64 feet over the edge of the Tower and spins you at a force of 3 Gs for a truly mind-bending experience.
You can find more info on those rides and stats from their official site: http://www.stratospherehotel.com/thrills/
Oh and by the way, the High Roller was the only ride removed.
Hope that helped!
References :