HD Moore published a blog entry on Sunday stating that he plans to issue a new browser bug each day through the month of July.  Two are already out and it looks like one of them is pretty nasty.  FrSIRT has some analysis available.  Here are the links:

HD Moore's original comments

***CAUTION*** the following links point to pages listing the actual exploit code.  There are "demonstration" links on these pages that if followed might cause your computer to lock up or crash.  Click with care!
Bug #1
Bug #2

These first two appear to be unpatched Windows Internet Explorer issues.  We'll post more comments as this develops.


Marcus Sachs
Director, SANS Internet Storm Center