There was this collection of fan-contributed magi (complete with items, spells, and so on) that Atlas was making. Erik's silence also hints that he might have been invovled in that, and it would fit the missing slot of the year: goodies for magi.
I really don't know what's going into a the other slots I supose it could be the open call book. However if I recall correctly the open call document said that the book was probably not be out in 2008. I only suggested hedge magic because we've been hearing about it for years (and I'm really really looking forward to it).