I have been forgetting to mention it here, but Dorothea is doing a great introduction to Movable Type over at Caveat Lector. It starts with “What’s a Movable Type Template?”, which is as good a place to start as any.
MT newbies would probably be better off if they could view the MT source on blogs they like, just as well all learn HTML by stealing from others. If more authors used the Show Templates plugin, that would be possible. I’ve been remiss about adding that to this blog, but expect it to be up and running this evening. In the meantime, Mark will show you his.