Security advice from an expert

Found a couple of sites run by an amazing expert today – Too good to hide. For those wanting to secure their WordPress sites properly :
WP Cop
The other is more suited to those who are running their own VPS servers.
VPS Bible
This is aimed at those who have climbed the rung from shared hosting to their own VPS.
Both are VERY comprehensive resources and the VPS bible even has a book for free download!