This list is an eclectic mix - Essen games, games now printed in English and/or released in the US for the first time, and new versions of old games. Some of these have already been released. Some were previously only available in very small print runs, like Shear Panic. The one thing they have in common is they are NEW (along with a few notable reprints).
Expansions and straight reprints I left off for the most part, as well as wargames.
With a list of this scope there are bound to be errors and omissions - feel free to point those out and add any new game you find missing.
Some of these new Essen games are limited print runs and/or may never make it to the US. And while the announced release is for fall, of course some may be delayed.
I will try to keep adding more Essen games as they are announced.
For this list of games I am indebted to Rick Thornquist's amazing
www.boardgamenews.com, plus also the Thoughthammer.com home page.
* = to be release at/around Essen Fair
Does anyone worry there may be TOO MANY new games coming out these days? 
Good for us gamers but I wonder about the publishers.
Posted Wed Sep 20, 2006 11:36 pm
' New Pfifficus Spiele Boardgame'*
Blue*
Bolide*
Brettform 640*
Das große Federlesen*
Doppel(s)pass*
'DSA Brettspiel 3'*
Elk Fest*
Flip-Mat: Dungeon
Fluch der Karibik*
Ghost for Sale*
Hameln*
If Wishes Were Fishes*
Kunstmarkt*
Lost - The Game*
Medici
Musketier im Auftrag der Königin*
Necrophonic Saves the World (To be Retitled)
'New KRIMI Total Game'*
'New Reiner Knizia Game'*
Pompeji
Rainbow Metal Dice Combo
Runequest: Glorantha - The Second Age
Schneller als kurz*
Sitting Ducks*
17027 ?
Sport ist Mord*
Stilbruch*
SuDoKu - Das Würfelspiel*
SuDoku - The Cardgame*
Tavern*
Teamwork Mozart*
Tschuck*
Urmel aus dem Eis*
Walhalla*
Willi wills wissen - Das Quiz*
Galactic Destiny
Die Drachenbändiger von Zavandor
Fiese Verliese
Mücke Autorenrechte - publisher?
Palm Beach Island Resort
Killer Karnickel und die Jagd nach der magischen Karotte
Notre Dame - Alea
Piraten auf Schatzjagd
Verflixxt nochmal!
Primo Calculino - Selecta
Waimiri
TurfMaster (2nd Edition)
Ausgerechnet Uppsala
Der kleine Sprechdachs
Usgrächnet Bünzen
Welt der Biere
Yspahan - need to add?
Die Baumeister von Arkadia
Cosmic Attack
Versailles
Formidable Foes - ‘Friedemann Friese Dungeon Game’
Fabulantis
Turbulento
Gangster
I've decided not to keep adding to this list - just check out the Essen 2006 Canonical List:
http://www.boardgamegeek.com/geeklist/14995
I'm also going to change the way I do these lists - instead of "upcoming games for the next quarter" I'm going to do "games released in the this last quarter." Seems more practical and useful, since half the announced games ship at least a quarter later than they're supposed to.
But to start off, my next list will be done in January - "games released during 2006."