This is your home page, served by Jigsaw !
You can edit it as the file
<INSTDIR>/Jigsaw/Jigsaw/WWW/Overview.html
.
For further questions, comments, criticisms, a mailing list is available, to subscribe send email to www-jigsaw-request@w3.org with the word subscribe in the subject. Before posting, you're welcome to check the mailing list archive.
As of 2.0.0, Jigsaw's configuration is handled through a full-blown Java application named JigAdmin.