Jeff:
I think he's talking about a wiki that has implement URI tests prior to posting.
Regards, KAM
I'm here because I was just using some wiki software that told me I can not insert my domain: http://www.milius.net there because it's in this list: multi.surbl.org
If your domain is not listed then you should be fine.
What version of SpamAssassin are you running? If it's before 3.1