suffle2 has managed to port PSGroove to Redbox (a open source firmware for MP3 players and iPods).
This is a patch for rockbox which replaces usb functionality with that of psgroove.
Currently it is only functional on PP502x targets, and has only been tested on a
5th generation ipod video.
Additionally, the descriptors/payload is the vanilla psgroove data at the moment.
I hope to eventually port Aaron’s changes to build descriptors at compile time…
or someone else can do this change and commit it