From what I heard, the experiment could not be replicated by other researchers - often a good sign of a hoax. But of course antimatter isn't impossible. It's actually very easy to make the particles to build it with - the hard part is trying to stop contact with normal matter, which it mutally annihilates.
I don't see much of a practical use in this, apart from high-energy physics experiments: it takes more energy to produce antimatter than you get from it as a power source, so you can forget the Star Trek "antimatter-powered ships". However, saying that, a few grams of anti-hydrogen can release more energy than the biggest hydrogen bomb, so it can easily be used - and probably will be used - as a weapon of mass destruction. Just what we needed.
Good news is, we are centuries away from being capable of gathering a few grams of it. Which is just as well. The only thing more startling than human ingenuity is human stupidity.
