See clarification in next post down
So, just for clarity, the differences between the devices are?:
Galaxy S Wifi 4.0 = YP-GB1 (and presumably also the YP-G1?)
Galaxy S Wifi 5.0 = YP-G70 and YP-GB70 (my UK version with a physical home key is a YP-G70CW, so is the YP-GB70 the US version with all capacitive keys)
Galaxy Player 50 (3.2" screen) = YP-GB50
US versions have all capacitive keys at the bottom of the screen, no hdmi out. Does that hold for both the 4.0 and 5.0?
International versions have a single physical home key between the two capacitive keys at the bottom of the screen, no hdmi out. Again is that true for the 4.0 as well as my 5.0?
My understanding is that there's also a Korean version which has a mini-hdmi out port, no idea what the product code is for that nor what the keys are like.
If you look at the opensource.samsung.com website under "Mobile > MP3 Player & Etc." is shows a choice of product codes to choose from.