Copyright
The Bern Convention makes the creation of any human readable document the property of the creator. It's really important to put the words "copyright 2007, Dillon Pyron, all rights reserved", but not neccesary. In fact, every thing here is copyright the original author, if I understand copyright law (at least as it pertains to the US). But I'm willing to bet you signed those over to the Reg when you signed up. If that's not in the Ts&Cs, if should be.
But, remember, copyright only applies to human readable. So they would have to prove that this mysterious person did, in fact, steal the source code. I'm not sure about what happens if you steal the object, I've never tried to patent software, I've always objected to that. Now the UK and EU have different laws, so the above may or may not apply. But the Bern Convention does.
BTW, since I did technically copyright this post, I grant The Register, it's parent company, all affiliated companies and any successor or heirs full rights to publish, broadcast or otherwise distribute this material in any media now known or to be discovered in the future.