Ok, a German newspaper announced that Zierer is building a Tower Launch Coaster for "Salt Lake City". No actual park was named, but could this be the Lagoon coaster ?
Everything matches the rumors and the rendered ride seems to fit the construction site. Especially the trench / tunnel is clearly on this ride as well.
A quick translation:
It will be the biggest coaster ever constructed by Zierer.
It goes to Salt Lake City in the US state of Utah.
It will open in Spring 2007.
name: Tower Launch Coaster
height: 35 m (115 feet)
length: 625 m (2050 feet)
speed: 90 kph (56 mph)
trains: 5 (each one consists of a single car, holding 8 passengers (2 rows of 4))
The trains will be launched vertically along the tower by LSM.
At a height of 35 m (115 ft), the train crests the hill and drops vertically back to earth, reachin a top speed of 90 kph (56 mph).
The ride features a camelback hill (according to the article after the drop, altough the rendering only seems to have a little speed bump), a horseshoe turn, a zero-g roll, an Immelman and a "half pipe" (two compact vertical turns, like a snowboarder or skateboarder would do in a half pipe)
Trains are lapbar-only ! The park insisted on having lapbars instead of the usual over-the-shoulder restraints found on most inverting coasters.
The final tests will be completed at the Zierer factory in Neuhausen (Germany) during the following weeks, then the final containers will be shipped to the USA. A large amount of ride pieces is already on it's way.
The new ride type has a cost of between 4 million and 6 million euro, depending on the size.