I've just seen the teaser video for the series.
I think it was very nicely done ^_^;; I love the work that has gone in to making it look as close to the cartoon as possible.
On Wallace's back-up voice actor: there is a notable difference. I don't think it will matter too much as after half an hour we'll all be used to him like we did with Sam and Max. Might make switching back and forth between the shows and the game a bit odd though.
So, can't wait for the demo on Monday then?