Hi!
I wanted to wait until there's a better base for working with CL-WIKI's code, but it seems there is some demand for a darcs repository _now_.
You can get darcs at http://www.darcs.net/
Getting the CL-WIKI development(!) darcs repository:
darcs get http://common-lisp.net/project/cl-wiki/repos/cl-wiki_dev
If you want to update just enter the directory of your local darcs repository and
darcs pull
Please remember: This repository can contain broken code!
Regards, Stefan