I'm running SA with sendmail using milter-spamc to connect them.
It's working ok, but I would like to know about your experiences using SA and milter, and which one you think is the best to use. I have not seeing many people trough the list using milter-spamc, and I like to hear of some one :)
Although I don't use a milter at all (I use MailScanner, which is queue based), as far as milters go your two most popular are milter-spamc and mimedefang.
From what I understand, if your intent is to just run SA, milter-spamc is a good choice. MimeDefang on the other hand lets you do a whole lot more, if that's what you want.