I don't know if anyone is porting rockbox to Philips GoGear SA19xx/37 (or any other SA19xx) mp3 player, but...
Is it possible with the 128x48 black and white LCD with only three lines of text? It's a pretty solid mp3 player (it's casing is aluminum.) What is really annoying the startup time is terrible. It checks if it needs to update it's library every time you turn it on. This would never happen in Rockbox. If I knew how to port Rockbox to it I would. I might, actually.
Here are technical details:
http://download.p4c.philips.com/files/s/sa1942_37/sa1942_37_pss_aen.pdfIf this helps anyone, I opened mine up and here are some inscriptions that are on the PCB:
W826
SA19XX-6
(not much on it. I didnt have my camera ready when I opened it. Otherwise, I would have taken pictures.)