If you have been watching the blogs or the Herald you know about the Mythic Challenge. Basically Mythic sent out a bunch of bones with heiroglyphs marked 'Rosetta Bone' style on them and then sent a few skulls out (5) to different Fan Sites (MMORPG.com, Gamespy.com, Kotaku.com, Massively.com, and Tentonhammer.com).
Enough of the Coded letters have been posted to figure out at least one if not all three of the currently posted Cartouches.
http://tok.blogwarhammer.net/?p=1405
http://www.epicslant.com/2009/06/a-dubious-package-on-my-doorstep/
http://datoughest.net/?p=3
http://www.keenandgraev.com/?p=2524
http://www.rainbowmmo.com/2009/06/youre-just-dripping-with-antici.html
http://werit.blogspot.com/2009/06/bones-for-werit.html
http://biobreak.wordpress.com/2009/06/11/warhammer-make-no-bones-about-it/
For help: [From K&G]
MMORPG.com’s Cartouche: D J HA _ T U M N _
Kotaku’s Cartouche: _ E M _ N _ O M E _
Massively’s Cartouche: L UT _ M HUT T
http://www.dev-elements.net/warkey.htm
Also there are plenty of hints on Warhammer Alliance:
http://www.warhammeralliance.com/forums/showpost.php?p=4182211&postcount=100