answers from the newest Q&A at the official forum:

Much better turnaround on this one, wasn't it? I got a chance to bother the audio team directly, and they are some great guys to chat with. Their answers and your questions are below.

Will any of the new tracks from the soundtrack being available to buy or download?

Unfortunately, no. We won’t be releasing an official soundtrack. As a professional courtesy to Maestro Williams, we do not release soundtracks for our Star Wars or Indiana Jones games. Maestro Williams is kind enough to allow us use of his music in our games, and as a thank you to him we do not compete in the marketplace against him for soundtrack sales.

Who's doing Indy? David Esch?
David Esche won't be appearing this time around, instead we'll be getting John Armstrong. You might recognize him as the voice of Han Solo in Empire At War.

Any other voices we'd recognise?
We've got a few great voices who take part. While you're battling thugs in Chinatown, keep an ear out for the voice of the killer in Scream. Yes - Scream. While he won't be telling Indy that he's in his house, Roger Jackson plays a number of thugs Indy comes up against. In the Co-Op mode, Indy pairs up with his father, the great Henry Jones Sr. Lewis MacCleod took the reigns for the familiar voice, but the hardcore Star Wars fans know him better as Sebulba, the great pod racer from Episode One.

About the audio... will loyal Lucasfilm-Fans hear a good, old Wilhelm in this game?
Our favorite scream makes more then one appearance, yes.

So, How many audio tracks are we going to listen during the gameplay? The soundtrack is composed of about 40 minutes of brand new tracks created by Gordy Haab and Ray Harman. The rest of it (hours of it) is made up of never-before-heard music from the days of Raiders and Temple of Doom. We wanted to keep the feel of the old movies, but we didn't want to beat you over the head with the old music. It strikes a great balance.

Has Ben Burtt been consulted or had any involvement in the game development process?
While some of his sound effects from the original films (punches, falls, etc) make it into the game, Ben hasn't been around during the devlopment of the audio. He's a busy, busy guy.

Can we listen to any music track at any time?
There isn't a Jukebox mode, sorry.

Oder besser noch auf einem High-End PC...volle Details, Spiegelungen, Shader, Kantenglättung... :'(