I don't know if Monte plans to continue writing this given that he's stepping back from game-related writing.
Whether he writes it or not, I definitely want to see it continue.
If you need a new writer, please try and get either Robin Laws or Aaron Allston.
And if neither pan out, then I think Sean Reynolds' take on things would be interesting.
Robin Laws would get my vote any day. I have loved all of his articles that appeared in Dragon magazine over the years. His "Guide to Good GameMastering" is equally good (some of the stuff he wrote in the DMG 2 was very similar to his Guide to Good Gamemastering.
Olaf the Stout