Yes, indeed, the VoIP Security Alliance has joined the Twittersphere with:
Feel free to follow us there if you are a Twitter user. The primary reason we are on Twitter is so that Twitter users can follow whatever blog posts we post here on the Voice of VOIPSA blog. We’ve noticed over time on other sites (and in our own actions) that some folks prefer to be notified of new blog posts via Twitter versus a RSS feed. So now you have that choice. Subscribe via RSS or via Twitter. We’ll respond to tweets as well, of course, but our primary goal is to provide another way to consume VOIPSA content.
If you are on Twitter, please do feel free to follow us. Thanks.