Des, you did indeed see some hints of the new Key Note in there. Since I just shelled out for iWork '08 it seemed the ideal opportunity to give it a whirl. I'll be writing up a full review over the next day or two. The short version of that review will go something like "If you want to make visually pleasing presentations with the minimal of effort then Key Note is for you - it just works".

As for the font, not even sure it is Comic Sans, I'm pretty sure it's an Apple font that just looks a bit like comic. However, that's just splitting hairs, I think Dave's comment above hits the nail on the head. It's one of Apple's standard themes and it works. It looks like writing on a blackboard so I thought it was perfect.