Some AppleScripts were just released--one for doing just that.
http://www.apple.com/applescript/iphoto/
Whoops--sorry, I didn't read your post thoroughly. There is an export to QuickTime function that I saw--not sure if audio exports, too.
iMovie might be a better solution.
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edit#2
If the applescript I referred to puts the pix and music into a QT player--you should be able to export it with QT Pro.
[ 01-08-2002: Message edited by: scottiB ]
[ 01-08-2002: Message edited by: scottiB ]