Fey, not Foul
Personally, I've always seen that a truly beautifully realized (Draconomican-esque) Book of the Fey would be an excellent addition to the game. Considering the depth of the historical/mythological source material out there, there's plenty to draw upon. Every time I look through a book like "Good Faeries, Bad Faeries" or the various books by Brian Froud, I always think to myself "Man, I wish we had stats and abilities for these guys." I mean some are just so alien-like! I was very pleased to see the boost to the field that the FF brought to the fey, which really just made me want more info, not less.
However, all that being said, I doubt that WotC's going to be giving me that book anytime soon. I recall reading an interview with one of the Designers (wish I could recall the source -- probably re: Ghostwalk's history) where they said that at one point they were all asked to submit their best ideas for new projects for the next few years. And, it wasn't long after that that "Fey Feature" showed up on the website as a regular column, so I assume the project pitch just sort of got an amber-light, instead of a green-light.
I think it's a wonderful idea and column -- the two authors do a great job of adding extra ideas, and making cool historical and artistic references. I just want it all put together in a more cohesive, collectively useful format ... with gloriously colourful, original artwork.
Sigh, just faerie-dust dreams

perchance. ~ALX~