I found a recent article today on the security vulnerabilities in using two popular Web 2.0 technologies, Twitter, and Jott. I posted about Jott a while back, it is a web based voice to phone to email gateway app. Twitter is a web based app where you can update your current whereabouts and happenings in real time via web, email, or text messaging (sms). Both services use caller ID for verification and as you will see in the article, caller ID is easily spoofed creating a gaping security loophole. Read more.