The Microsoft Security Response Center (MSRC) team has announced today that a lot of vulnerability-related information will be posted on the new Microsoft Security Vulnerability Research and Defense Blog located at:
On the new blog, the team says this:
We expect to post every "patch Tuesday" with technical information about the vulnerabilities being fixed. During our vulnerability research, we discover a lot of interesting technical information. We're going to share as much of that information as possible here because we believe that helping you understand vulnerabilities, workarounds, and mitigations will help you more effectively secure your organization.
You can read more about it here.