If you want to book restaurants now, use the 2008 list. If it turns out (not likely) that a restaurant you want is not on the 2009 list when it comes out, change that reservation to an eligible restaurant.
Note that the new T-Rex restaurant is not on the 2008 dining plan and most likely will not be on the 2009 one.
That version is not finalized yet. Disney is currently waiting for all non-Disney restaurants to sign their contracts before they can add them to the plan. Once they've signed their contracts, they'll be added to that meal plan brochure. Until then, that brochure is not nearly complete.i found the 2009 meal plan brochure pdfs at mousemisers.com
I had this email response from T-Rex Restaurant
"We will be on a walk-in basis only until 2009. You may check our website at anytime or call 407-828-TREX (reservations are currently not being taken). We will be accepting the Premium, Platinum and Wine and Dine Disney Dining Programs for those on Disney Dining."
if you read the dining plan brochures you will see a list of restaurants that accept the dining plans. Not all restaurants on site at Disney are owned by Disney. And some choose not to participate in the dining plans. There are still a ton of restaurants to choose from because most participate.
I don't know if it's different, but DVC already has the 2009 list up.