http://hands.com/~lkcl/eoma/rockchip_rk3288/ http://rhombus-tech.net/rock_chips/rk3288/firefly/
for anyone who's interested, i've published the PDFs of both the 8-layer PCB and the schematics. i'm also documenting resources for installing mainline u-boot and linux kernel on the RK3288 firefly (t-firefly kindly sent me a developer board). apparently there are people who have installed debian stable on the firefly (for headless use) out-of-the-box, which is a really good sign.
the RK3288 because it's a slightly older SoC which was used in the Asus C201 chromebook, it seems to have extremely prolific "HOWTOs" out there, as well as stable support in the official chromium kernel releases and a stack-load more.
the only thing which is a complete utter pain: the 2nd USB controller (not the one that provides both 1 USB and 1 OTG port) has at least two known hardware bugs. first is: it doesn't support USB 1.1 devices (argh...) and second it doesn't come back up on resume.
fortunately the *other* USB controller - the one that has 1 USB2 Host and 1 OTG port - works perfectly. on the firefly rk3288, i tried the OTG Host converter cables i have, plugged in a USB keyboard, up it came first time.
i think the RK3288 would be an awesome choice for EOMA68, not least because it can do 4GB RAM.
l.