Well I tried contacting them, and this is what I got back:

Hello Frank,

Thank you for your email. We value your interest in Walt Disney Studios Home Entertainment!

The Star Wars Trilogy is currently unavailable and no re-release date has been set. We would be happy to share with the rest of our team that you would like to have this available for purchase again! Your feedback helps us build a better experience for all of our guests and is truly appreciated!

To see what great titles are currently available and coming soon, please visit www.disneydvd.com!

If you have any other questions or concerns, please feel free to reply to this email. You may also contact us at 1-800-723-4763 (Canada: 1-888-877-2843), Monday 9:30-7:30 and Tuesday through Friday 9:30-6:30 CST.

Sincerely,

Walt Disney Studios Home Entertainment Consumer Relations
US and Canada