What they are trying to do is to find anti-matter and to see if matter can also be created in this fashion. I think its pretty cool, although there are some funny rumors that it might open a mini-black hole and suck the whole planet into it causing the end of the world as we know it. I don't think this will happen, it will just result in a really cool explosion and make some nice swirly pictures that will be posted on the internet. They aren't scheduled to start real testing till later this fall but the concept in itself is mighty cool.
I hope they mention this sucker in the show The Big Bang Theory, that show is quite funny and it would tie in perfectly with the characters and the title of the show.