have you looked at sheeva or guruplug uboot ~+ architecture. I think entourage just ripped off that platform (probably uboot) as well.
ideal I undestand you can change the uboot arguments to boot from sd card leaving the existing uboot+os untouched while booting and testing from sd. than restore the args in uboot and boot back from internal sd? just an idea guys.
http://www.plugcomputer.org/plugforu...hp?topic=183.0
also another thing. did anybody discover how to jtag this unit?