Well I just received this response from customer service at Song.
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Thanks for getting in touch with Song.

By early 2004, every seat on Song flights will be decked out with a
personal video monitor so you can:
-watch digital satellite TV from DISH Network
-create a playlist of digitally-streamed MP3s.
-watch pay-per-view programming on demand, there's
something for all ages.
-play multi-player interactive games with other
passengers.
-find points of interest along your trip with iXplor,
a zoomable video map.
-get gate information for connecting flights.

The video installation process is scheduled to begin in October of this
year. With that being said, some Song aircraft will be completed sooner
than others, but unfortunately your September trip will not have this
feature.

We hope to see you soon on Song!