There's a project whose concept is somewhat similar to EOMA-68, but they are using Intel bay trail CPUs for now. That's the Indiegogo page with all details: http://igg.me/at/icecomputer/x/1760545 For a summary, you can check my blog: http://www.cnx-software.com/2014/01/19/ice-xpc-modular-x86-computer-is-as-sm...
The campaign perks may be delivered too late in the future to be successful, but it's yet another project with modular CPU boards.