I just received word of a new one- both a Blog site and an RSS feed.

Vulns.com was founded by information security heavyweights Becky Bace, Gerhard Eschelbeck, and Mike Shema.

Vulns.com -- the vulnerability community -- brings you the latest information on vulnerability management and assesment.

The Blog site link is here: Vulns.com

The RSS feed XML code is here: Vulns.com RSS Feed