The official documentation for SKS is:

• The man page
• The README from the source distribution.

Within this Wiki, you might start at the Peering page, for advice on setup and social issues.

There are also some external sources of documentation:

• Keysigning.org had a great summary about how to set up SKS.
• A blog post describing how to set up SKS on ubuntu.
• Another guide

Hopefully, this wiki will itself turn into a useful source of information about SKS.