If you are into OpenSource Security products, and you are reading this blog, you might be interested in another product that we have from Sourcefire, ClamAV. ClamAV is our OpenSource Anti-virus scanner that is available for free at http://www.clamav.net.
However, what you may not know is that we have a blog for ClamAV as well. http://blog.clamav.net
So, to round it up, if it's:
Snort -- http://blog.snort.org
ClamAV -- http://blog.clamav.net
Research (VRT) and Razorback related -- http://vrt-blog.snort.org
I will try and keep these three blogs updated to the fullest with the most appropriate content in each of their respective points of information.