I've located it ... 

OpenEmbedded User Manual

BitBake User Manual

On Dec 13, 2008, at 10:58 AM, Elvis Dowson wrote:

        Where can I find some more documentation about the bitbake / openembedded build process for overo?

I've followed the steps documented in the gumstix website, to get a console image up and running. Now, I'm interested in figuring out how to get a graphical login session up and running on the Overo.

Best regards,

Elvis Dowson