Dan Farber at CNet says:

University of Washington scientists Rajesh Rao and Andrea Stocco claim that they are the first to demonstrate human brain-to-brain communication. Rao sent a signal into a Stocco's brain via the Internet that caused him to move his right hand. Brain-to-brain communication has previously been demonstrated between rats and from humans to rats.

Here's video:

The press release is here. It goes without saying that this could be huge. It's easy to go from this video directly into a sci-fi novel when you start to consider the implications. The idea of hacking another human being is a potent concept that sci-fi has been wrestling with for decades.