Thank you for posting this, dh just called and said he'd heard about it a while back and was thinking about it for ds1. Might not be any available for quite a while though.
My ds had an enormous obsession with Zelda at the age of 8 as well. He has moved on now, thank goodness. Current obsession is Star Wars, despite never seeing any of the movies. 
He has read the whole of the Complete Visual Dictionary several times though and can tell you all the plot lines and characters etc. Won't even entertain watching the films, only just the Lego DS Games and Clone Wars animated series.
Indigo, dh thought this might be a good introduction for ds1 before they start rebuilding our old pc, which is currently on its last legs, together. He's already tried getting ds1 to have a go at programming. He wants to do it, in that he likes the idea, but he needs a 'hook' to grab his attention. At present he seems to think he can grow up and automatically get a job as a games tester and that will mean just sitting playing games all day. We've tried to explain that he needs to understand how games are made and to learn programming first and he's says he knows that and wants to learn, but I think he needs that hook to get him started.
He is interested in having a go with Scratch and dh keeps promising they'll do it together.