Analysis of 32 million breached passwords
Imperva released a study analyzing 32 million passwords exposed in the Rockyou.com breach. The data provides a unique glimpse into the way that users select passwords and an opportunity to evaluate the true strength of these as a security mechanism.
The complete study (pdf) : http://www.imperva.com/download.asp?id=239
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump