My mom was very proud that she heard the name Sidney Thomas floated as a potential SCOTUS pick before I did. I told her that there's no way he's anything more than a name. Democrats aren't going to nominate a total darkhorse like that -- too risky.
But the other two names the article mentions -- though both equally implausible -- at least are theoretically interesting. I've heard at least one other person mention Harvard Law Professor Elizabeth Warren, a bankruptcy specialist who would make the nomination discussion all about economics (good for Obama). And, well, you know my opinions on Martha Minow -- so I'll just add that if you want to put a liberal's liberal on the court, she's possibly the only candidate that could make Pam Karlan look tame (Minow's liberalism, to be clear, manifests itself as 100% pure awesome).