Digital downloads and Amazon S3 integration

Help? I just purchased a membership because I saw that WPMU Dev handled, amongst other needs, the digital downloads and Amazon S3 (which I had with a previous vendor). I realized, after I paid, that when I searched it took to me to a link outside of the the site to another vendor.

So can I create a music site and sell digital downloads? And have the downloads come from Amazon S3?

If not I might have to bail and go with a hodgepodge solution from another vendor.

Thanks,
John...