Google has recently rolled out a security blog and released a technical paper and now the just bought out an anti-malware company as well. And one of their employees wrote a cool app for webmasters to check and see if their sites have
malicious code. Read & Discuss Here
And I stumbled upon a neat write up showing a bunch of firewall testing tools to see how secure you really are. Read & Discuss Here
Digg links for both on respective page.