I've now written a sequel to my guide
How To Win (DMCA) Exemptions And Influence Policy
http://www.eff.org/IP/DMCA/finkelstein_on_dmca.html
The latest guide, discussing submitting of DMCA reply comments, is
Winning (DMCA) Exemptions, The Next Round
http://www.eff.org/IP/DMCA/finkelstein_on_dmca2.php