http://www.guardian.co.uk/international/story/0,3604,912940,00.html
A brain implant, it's on it's way. Check out the above story.
Here's a taste.
Brain implant may restore memory
Tim Radford, science editor
Thursday March 13, 2003
The Guardian
US researchers are poised to test an artificial aid to the brain. They have made a mathematical model of a memory store called the hippocampus, and programmed it on to a silicon chip. This could one day be fitted to a human with brain damage from stroke, epilepsy or dementia. May I add forgetfulness.