I've put a newer Gentoo image over at Miniand you may want to look at. Lots of hardware support, plenty of goodies installed, has a working framebuffer and X desktop with choice of Fluxbox or Gnome etc. It's only new but so far the reports are good.

https://www.miniand.com/forums/forums/development/topics/new-gentoo-based-image-for-mk802ii

Cheers, Cray.Ze.Ape