From Wizards.com...http://www.wizards.com/DnD/Article.aspx ... s/20110119
"If you think you have what it takes to brave the fiercest foes, fight the toughest battles, and conquer the vilest enemies, we have a new D&D play experience for you! Starting in September, gather your master tacticians and rules experts together to kick down the dungeon doors and begin the assault!
The new Wizards Play Network in-store program pits tactically-minded players against a super challenging adventure where the difference between victory and defeat is dependent upon your game knowledge, ability to adapt, and a little bit of luck. You’ll pit your wits against some of the most challenging encounters you’ve ever played. Each adventure plays in just a few hours, but for many players, they’ll need to make more than one run at it in pursuit of victory. A season lasts 2 months, and stores can schedule their sessions at any time during the season.
Bring extra character sheets. Bring Fortune Cards. You’ll need them.
Begin your lair assault this September."