The "wip-guile" branch of Emacs —available at
http://git.hcoop.net/?p=bpt/emacs.git;a=summary— has been rebased onto the latest state of the trunk (as of last week, 23 April 2013). And according to the
Guile Emacs ToDo page, it is mostly indistinguishable from a normal Emacs build.
What would you need to see in order to be convinced that "wip-guile" is mature enough to be incorporated into the trunk? Which concerns have yet to be addressed?
--Josh