Here is the info I promised you. It's taken from www.thedigitalbits.com/rumormill.html about 1/4 the way down the page
“Also, we've heard a reader who recently had the chance to talk with Star Wars sound designer Ben Burtt about the upcoming DVD release. Here's the info (special thanks to our reader for sending this in):
I spoke with Ben Burtt recently. He mentioned the upcoming Star Wars DVDs. It seems that they were able to go back and digitize all of the original tracks and rebuild the show from scratch. For the previous Theatrical Special Editions they were only able to go back and re-mix and edit from the pre-mixes which were sonically limited by the analogue recording and reproduction systems of the time. Since Ben was responsible for archiving all of the sound on A New Hope, all of the sounds were able to be found except for a couple of foley tracks which I'm assuming will be re-done. So it seems that we will be hearing Star Wars in a way we've never heard it before. He did not mention if Empire and Jedi would be receiving the same treatment.”
Can you imagine how good the new soundtrack will sound if this info is correct. DAMN!