Neural interface is something I've been upbeat about over quite a few blog posts so far.
The world is still a far way from B2BC, but I'm sure we'll get there soon.
Here's another addition to this topic, this time thanks to TED and Emotiv. Emotiv, like NeuroSky, about which I had blogged sometime in September 2008 provides developer kits to further this interface:
On a different note, some solutions are better simply because they are much simpler.
Check out Pranav Mistry's Mouseless - priceless!