The 2011 Walt Disney World vacation packages are available for booking
Le Cellier is indeed a Signature Dining location (two table service meals) at dinner after 3/1/11. Lunch will still be one table service meal.
Here is a link with all the current dining PDF's: Fairy Godmother Travel
Note: Many of the restaurants not owned and operated by Disney are not added to the Dining Plan until later in the year, so if your favorite dining location is missing, that may be why.