http://www.minecraftforum.net/news/558-lawsuit-filed-against-mojang-this-time-for-obscure-patent/The same person suing Mojang is also suing many other game developers (including the heavyweights such as EA), so, honestly, I don't see this going anywhere and it looks a lot like a money grab and as some people said on the thread there, being a patent-troll.
I didn't read the PDF stuff, but someone on there said that Uniloc sued 74 companies over what, from the quote, sounds like an extremely vague patent that could be anything.
Seriously though, I don't see this going anywhere.