Threat Focus Diligence provides customized 24/7 vulnerability and patch alerts for more than 1,000 products, giving IT and network managers the security information they need to protect their assets. http://www.threatfocus.com/
Mailing list facilitates networking and information exchange related to patch management: announcements, testing, verification, operations processes, and vulnerabilities. http://groups.yahoo.com/group/patchmgmt/
Patch management tool that helps secure systems by remotely managing service packs and hotfixes. Conduct research, take inventory, deploy updates and validate installations to networked machines. http://www.patcheasy.com/