A [Newer] new way to fight blog trackback spam
"Hi Roy,
Just thought that you might be interested to know that I’ve just posted a new trackback spam solution on my blog here: http://briandela.com/blog/archive/2005/06/29/652.aspx
This solution will work for any ASP.NET based blogging engine including dasBlog and .Text and doesn’t require any changes to the applications themselves.
Brian"
Coolness. This should be integrated into SubText, don't you think?