The event changes from year to year, but I don't think the 2008 information is out there yet--as far as schedules go. Most of the time you have to wait until something is printed (and, often times, released to the general public--aka first party).
As far as ADR's go, you know the time of the party (and can get into the park at 4 PM)--that hasn't changed! You will want to be in the park and ready to hit the party no later than 6:45 PM, imo. Make an early ADR for dinner, or just plan on getting counter service. You can find which restaurants will be open when.