The official Star Wars website has the list of guests for each of the 2008 Star Wars Weekends. They also mention that Warrick Davis is returning as the host for the event. Please remember that all these guest lists are subject to change.
June 6-8 — Jeremy Bulloch & Daniel Logan
These two actors have something in common. They both played legendary bounty hunter Boba Fett. Both actors have attended Star Wars Weekends in the past, but never on the same weekend.
June 13-15 — Peter Mayhew & David Prowse
Peter Mayhew played the loyal Wookiee Chewbacca in the original trilogy, and in Revenge of the Sith. David Prowse played the role of Darth Vader in the original trilogy.
June 20-22 — Amy Allen & Matthew Wood
Amy Allen played the role of the striking Jedi Knight Aayla Secura in Episode II and III. Matthew Wood was Episode III’s Supervising Sound Editor as well as the voice of the evil General Grievous in that movie and the upcoming animated series, The Clone Wars.
June 27-29 — Dave Filoni
Dave Filoni is the Supervising Director of upcoming The Clone Wars animated feature and series.
Star Wars Weekends is at Disney’s Hollywood Studios. It usually features meet and greet opportunities, a parade, and Q&A sessions with the weekends guests. Hopefully the newly enclosed Backlot Theatre will be open by then. I’m noticing the guest list on the Disney hosted page is a little different than the list above. Stay tuned for changes, I guess.