Since I just wrote a post about Facebook's lack of privacy, it's appropriate to follow it up with a look at the dangers you get when hitching your Twitter account to third-party apps.
IOActive researcher Cesar Cerrudo (@cesarcer on Twitter) sent me a message this morning about his findings, which he outlines in the post, "You cannot trust social media to keep your private data safe: Story of a Twitter vulnerability." He writes of stumbling across the flaw while studying a Web app still under development.
I direct you to that post -- a useful cautionary tale with several screen shots so you know what to look for.
Read and heed the advice he offers at the bottom.
Safe Internet travels, my friends.