No, I don't believe this. Of course it's a joke. It's more than likely someone decided they were funny and things may end up going badly for WikiLeaks. Not to say that's a bad thing. The information released (while it is things the public needs to know, at least in some respect) is hugely dangerous. If you undermine WikiLeaks' credibility the information is still out there but it ceases to be a threat. Great epic fail/win whoever made this up.
Now for the unfortunate part...
From a physics perspective, one of the most time-efficient ways to travel is via wormhole. The problem is that a wormhole will still stop time (relative to you) as you hit the event horizon and still crush you down to the size of an atom. The solution: white holes. A black hole is a singularity of normal matter, with normal gravity, etc. A white hole is a singularity of foreign matter. Reverse gravity (at least in application to normal matter). While a black hole sucks in time and space, a white hole spews it out. A white hole placed in the middle of a ship so that its gravitational push affects the entire ship both infinitely and equally (and engaged at exactly the right moment; you wouldn't want to explode, would you?) allows the vessel to pass through a wormhole unscathed. The ship must conform exactly to the shape the of the gravitational push.
The optimal shape: a flying saucer
It would be incredibly thin and look like an empty shell opened up. Nothing alive could fit inside, it would have to use the perfect computer, one that could operate on the molecular level (this is really starting to seem impossible). They would have to use lazer or gravity-based weapons as all mass within the ship must be distributed to precise specifications. I have no clue what the margin of error here is, but it`s likely much smaller than humans can manage. The weapons couldn`t bombard us from space because they would expend too much of the oh-so-precious energy they need to return. It`s more than likely that these are advance probes sent to do some scouting for a much larger fleet that will arrive by more... survivable methods (say, warp travel) within the next couple of hundred millenia. Probably not in your lifetime.
