Here we go... the list of Wizards books this year and what use that my groups and I have made of them.
January 2006
Player's Guide to Eberron - I bought it, thought it looked neat, but it has been languishing on my shelf since then, despite running Mark of Heroes and Xen'drik Expeditions.
Races of the Dragon - Bought it, it looked neat, and will probably get used a lot in my next personal campaign, but otherwise it is sitting on the shelf.
February 2006
Red Hand of Doom - After much anticipation, I started DMing this last Friday. The next session is tomorrow. Yay!
March 2006
Power of Faerun - my first non-adventure FR purchase since 2001. I bought it for the advice on running high-level campaigns, but I'm very disappointed with this book. Too much generalities and not enough specific on constructing adventures for those games.
Tome of Magic - still don't own this
April 2006
Fantastic Locations: Fields of Ruin - I haven't used the adventure portion, but the maps have been the most useful from a FL product so far; the road is great, and the ruined keep has also made a few appearances.
Complete Psionic - We've been using several of the extra material for the soulknife (which is very good).
May 2006
Player's Handbook II - we've made extensive use of this book; especially the alternative class features, feats and spells. Great, great book.
June 2006
Mysteries of the Moonsea - don't own this one.
Fiendish Codex I: Hordes of the Abyss - own it, but I'm not a fan of the series of monster-type books. No use so far.
July 2006
Fantastic Locations: Dragondown Grotto - own it; haven't used the adventure, but the maps are very nice and have seen use in several sessions.
Secrets of Xen'drik - own it; I really like this book, but haven't used material from it yet.
Monster Manual IV - own it; I love this book. I've used several of the new monsters from it, and will be using more.
August 2006
D&D Dungeon Tiles - own two sets; and have been using them quite a bit.
Dragons of Faerun - don't own it.
Tome of Battle - own it and really like it; I've only used a crusader from it as a NPC villain, however. Will see more use in later campaigns.
September 2006
Faiths of Eberron - don't own it yet. (haven't seen it)
The Twilight Tomb - own it; haven't used it yet.
Dragon Magic - own it; haven't used it yet
October 2006
Expedition to Castle Ravenloft - Own it. Love it. Haven't used it yet, but will!
Complete Mage - We've had it only a couple of weeks, but, like PHB2, we're already using feats (reserve) and new spells from it. Very good book.
November 2006
Dungeon Tiles II: Arcane Corridors - haven't seen
Dragonmarked - haven't seen
Cityscape - just bought it.
Scourge of the Howling Horde - just bought it.
Cheers!