I haven't had the time to do anything more than skim this paper, but it looks like they connected two rats brains together and they managed to "become one". They even had one in Brazil and one in the US, connected over the internet.
I don't suppose we're too far from being able to do the same with humans and implantable electronics.
A Brain-to-Brain Interface for Real-Time Sharing of Sensorimotor Information : Scientific Reports : Nature Publishing Group
A brain-to-brain interface (BTBI) enabled a real-time transfer of behaviorally meaningful sensorimotor information between the brains of two rats. In this BTBI, an “encoder” rat performed sensorimotor…
Originally posted on Google+ · March 3, 2013
holy crap