Air NZ recently seem to work with a few people who know what they're doing. After releasing their nice "How far can you go?" RIA, I've just found a (beware of hype terminology :-) mashup using Google maps on their website. Sadly I can't link to it, as I'd have to provide you with my booking reference - but the story is bascially that after making a booking with them, one is able to look at "my bookings" in their portal and would be displayed a map of the trip.

As you can see in this screenshot, we're going to do a trip to the US...