"i've made sd/mmc adapters for the jb from all three...add a small switch to switch power between the jb interface and the usb interface, and you can use it as a usb thumbdrive as well."
For some reason this doesn't make sense to me...You still have to add a bunch of wires to interface with the SD card. and have some way for this adapter to plug into the JB.
Unless there is a GIANT step that you are leaving out.
Now I can see how you can use that thumbdrive, CUT OUT all the usb parts, and hard wire the thumbdrive to the JB, then glue the TD into the JB to get a nice clean if not secure port.
My bigger question is how they got the custom boot screen in one of those previous links.
An additional question. Since folks have been able to figure out how to wire up the SD...have they reverse engineered the video cards to get a video system going?...I didn't look that closely at the card but it seemed to just have a memory chip on it...which means the player is in the JB...which means there should be a way to play video.
But I am in the early stages of this thing myself.