I'm also writing a Guile program specifically for the static site generator workflow called Haunt: http://haunt.dthompson.us/
I'm currently adding support for the Skribe syntax that Skribilo uses and it will be available in the next release, after I convert my existing blog to Haunt from Pelican and work out any transition pains.
OK, Haunt looks pretty nice. According to my TODO, i'm still supposed to convert my website from Hakyll to something with parens sometime in the future, so i'll definitely keep Haunt in mind :).
I'm currently adding support for the Skribe syntax that Skribilo uses and it will be available in the next release, after I convert my existing blog to Haunt from Pelican and work out any transition pains.