> What sort of storage does it use

It uses a hard disk - one disk is more than big enough, because the product is restricted to 6 lists of 99 tracks (the same as a standard Ford autochanger). To increase the capacity each track can actually be a collection of tracks, but you can't select the "sub-tracks" independently.

> how does one load tunes and playlists into it

USB - if it goes into production it will ship with ripping/encoding software integrated into something like emplode.

Rob