Not enough info for a guide here yet, but definitely enough now for a post.
I wrote Jame just before WotLK. Some friends finally convinced me to play WoW this year. I consider myself lucky I found wow-pro.com quickly. Despite much PvP and profession distraction, I reached level 70 while starting the BEM section of the guides here.
I stopped most of my questing right then so I could resume them for experience when WotLK came out.
Here're my observations: