I've been working on another (still secret ) project and didn't work a lot on thiis howto... I've had to look into the new s-expr things though, and could probably write a quick intro/reference. Now that the new versions are in dapper, i can actually test things it'll take a few days though, henrique.
jason, I wouldn't call examples off-topic, so you could've posted them here. A new thread is fine too, please post a link here once it's available.
and thanks, manicka!