i'm not sure how far Yahoo spies on its user ( i know they place lots of cookies and that damn camera ads always appear when using Y!) but i can suggest putting your stuff in 'Groups' or 'Clubs' in yahoo.

they have 20MB limit, but so far i put mp3s there(disguised) without noticed and maybe getting closed because of it.
you don't need to log in or so to download the files - so if wanted, I can put un SD2 on my Y!site later on.

let me know.
Rev