Wouter,
According to all the reports I have seen, ISAF has chosen the Hobie 16 with spinnaker to be the youth boat for 2006 and 2007.

And where did you hear that the Hobie 16 with spinnaker has been made class legal? I can't find that anywhere. And what class would it be legal for? -- certainly not the Hobie 16 class. I would think the Hobie Class Association would have to establish a new class for the spinnaker version, which would fragment the existing Hobie 16 Class. So why would they want to do that?