Spam Assassin vs. SPAMD

[Sean Hafeez <sah_(_dot_)_list_(_at_)_gmail_(_dot_)_com>]

I am currently running a 3.5 box with Spam Assassin, ClamAV, Postfix
and Amavisd-New as a front end to an Exchange server (ugh, I know). I
am going to replace this box with a new one running 3.6 and I was
wondering if anyone as done a doc like this one:

http://www.flakshack.com/anti-spam/

that talks about a setup using spamd?

Thanks!