Yes... and no.
The powered USB cable works fine, but I gave up on the 60 Gig Maxtor OneTouch III Mini hard drive. On my 9886, it would play ~15-90 seconds of a track or so, and then the HU would say "UNSUPPORTED" and skip to the next track.
I just (today) bought a Seagate 120Gig "FreeAgent"...