The obligatory link: How things work: Electromagnetic catapults
As usual, it's exceptionally cool to watch things I've appreciated in the past as science fiction in the process of becoming science fact. Now, if we can just get the anthopomorphic robots to use with the EM catapults, we'll have something.
Meanwhile, elsewhere, we have this: Metamaterials found to work for visible light
The upshot here, amongst the many possible application of such things? Two words: Cloaking technology. C'mon, if that can't get the geek in you going, what can?