I've actually whipped up a GM screen by turning the two pages of portrait-oriented tables in the back of Book I into landscape-oriented layout for use with a tri-fold, landscape-oriented screen that has clear plastic for paper inserts. I think I got it from Pinnacle for Savage Worlds...I think. Anyway, it wasn't that hard. Just a bit of time on Illustrator and voila.
As for Dresden-esque Fate points and FUDGE dice, yeah, I am totally behind that.
Beyond those, though, as far as supplemental books go...I am torn. Sure, I'd love to fill a bookshelf (or an entire bookcase) with nothing but Dresden-related titles, both novel and game...but there is a point of market saturation. Granted, with two books we're nowhere near the over-saturation point, but there is a balance. Plus, as has been stated, so many of the various things mentioned are completely within the realm of fan-stating simply with the rules as presented. Give it another two months and I am sure we'll see several enterprising fan-driven websites pop up with an abundance of material.
