There is an older (2009) post concerning Subsonic on Pogoplug.

There are a couple of great music jukeboxes (Z-Subsonic and iSub Music Streamer) that work on the iPad, iPhone, Touch .... . 

To use Z-Subsonic and/or iSub Music Streamer, you must attach to the "Subsonic" server. 

Is there a straight-forward way to attach my Pogoplug hard drive to the Subsonic server?

Thank You,

Paul