http://answers.yahoo.com/question/index?qid=20081016193925AArnZse
The very first time I fell in love with the concept of giving characters unique name was watching a Playwright’s (whose name escapes me right now) showcase where a good friend acted in. The playwright used some of the most unique names, albeit those escape me now as well, but it’s important to note that because of the uniqueness of the names chosen, it resonated with me. Thus, when trying to write for new plays, I love using “characteristic” and not-everyday names. It also helps me to remember that each of these characters are supposed to be unique, from name to voice to actions to flaws etc.
The link above has some pretty good names to choose from.