I realise that this probably isn't of enormous interest to many folk (it only is to me, as I will be going to this particular park later this year), but anyway...
After 4 years in the SBNO wilderness, Walibi Holland's (the recently renamed Walibi World) Vekoma Boomerang - La Via Volta - is to re-open in 2011. Fitting in with Walibi's musically-inclined rebranding of all their parks, the new ride will be called Speed of Sound.Some concept art on RCDB.According to Vekoma's official website
, they have just delivered a "new train, with the latest comfortable restraints and a WOW Sound System" to Walibi Holland (nerd fact - the original trains are what now run on Pleasurewood Hills' Boomerang).
So, a Vekoma Boomerang with on-board audio and 'comfortable restraints'. That sounds to me like a ride with potential, especially if the audio is well synchronised with the ride experience.
Taking a leap here, but if Screamscape are to be believed, it will be the same restraints as shown here
, on Carowinds' Carolina Cobra. They do indeed looks less traumatic than the 'classic' Vekoma horse collar.
Edit - Just noticed that second picture in the Vekoma link seems to confirm the above regarding restraints.