I got this information for you from allearsnet.com:
Leave A Legacy - Introduced for the Millennium Celebration! Granite and steel sculptures are being covered with engraved images of Guests from all over the world. Here's how it works: Photo Capture Stations will take your photo digitally. It will then be etched onto a steel tile. Within approximately four days, the tile will become part of the stone sculptures.
The cost is $35 for one image per tile, $38 for two images per tile, plus tax.
There are computers at the site to show you where your tile is located. Certificates will also be mailed to you so you can come back on a future trip to see your Millennium image. Also within about 2 weeks, your image will be posted on the Internet at Disney's Leaving a Legacy page.
"The Leave a Legacy plaza was designed by veteran Imagineer John Hench, along with a team of Walt Disney Imagineering interns. Hench started as an artist with The Walt Disney Company in 1939, and went on to help design and build Disneyland. He was the original art director for Epcot, and chief designer of Spaceship Earth. The megaliths range from 3 to 19 feet high, and the heaviest weighs more than 50,000 pounds." (Disney's Press Release) Guest Comments:
Leave a Legacy at EPCOT project: We were really planning on taking part in this project until we saw it firsthand. The digital imaging is terrible. The granite slabs really detract from beauty and grandeur of the EPCOT ball. I hope Disney rethinks this project and restores the plaza. (Vincent Weidner) My wife and myself just returned (9/21 - 10/2/99) from WDW! We were 2nd in the WORLD to do the "Leave a Legacy! It opened on Sept. 28th at 8am. We did it at 8:03am! We are waiting to receive the certificate in the mail and the map telling us the location of the panel. (John & Lynda Kutey) Hope this helps you out some...