if you have access to Adobe Illustrator CS2, you can simply open up Adobe Bridge. Browse to your files and you'll be able to "batch LiveTrace" all of them. Unfortunately, it will only let you process 10 files (I think) at a time. There is supposedly a hack online that will let you change this limit.
ps. If ever you don't have access to Illustrator CS2, you can always dust off your old copy of Adobe Streamline :)