Just as a side note, if he took the source by the means of decompiling it, I wouldn't go 'after' him/her. There's a saying Microsoft has, saying "at least they're stealing outr software" as in, at least people are using their software and not Apples.(not saying my small plugin is like a huge software program) but at least they're using my plugin.
Your Minecraft name is EPIC. Anyways, I'm trying to figure out how to "extract" info from this site and my Bukkit plugin's site to use on my website. It's just a number displayed, so I think there's a way (or at least hope).