"Commercial Zero-Gravity Flights Begin in Las Vegas":

Zero-G's specially modified Boeing 727-200 aircraft -- G-Force One -- offers paying customers a largely empty fuselage that becomes a padded playground as the plane runs through its routine -- climbing and diving maneuvers that simulate the microgravity that astronauts experience. Flight operations are being conducted from Signature Air Terminal here at McCarran International Airport.

Only $3500 per seat! Here's the corporate website.