No one will know about the snacks for sure until next year. WDW publishes no official snack list other than the few snack items listed in the
DDP brochures.
The 2011 dining plans are exactly the same as the 2010 plans, except for the higher prices and the fact that the brochures are no longer listing a juice plus beverage as a breakfast entitlement - just one beverage.
You can see the 2011 dining plan prices in the Everything You Always Wanted to Know sticky thread.
http://www.disboards.com/showthread.php?t=2353648
Bottom of the first post.