Don't really understand what all this fuss is about...
Created an ibay to use....
Did what it said under 'FTP' in the SME 7 manual.....
Allowed the FTP port (21?) on the router....
Up and whizzing away with nearly 50GB of MP3s accessible anywhere in the world now!!

With the right password, of course!

No Linux needed - and 15 minutes to get it up and running....