Autonomous Wheelchair Responds to Verbal Command
From: Rehab Management - 10/13/2008

Massachusetts Institute of Technology (MIT), Cambridge, MA, researchers are
developing an autonomous wheelchair that can learn all about the locations in
a given building, and then take its user to a given place in response to a
verbal command.  

Read the entire article at:
http://www.rehabpub.com/RMN/2008-10-13_01.asp

Links:
Robot wheelchair finds its own way
http://web.mit.edu/newsoffice/2008/wheelchair-0919.html
http://current.com/items/89329327_robot_wheelchair_finds_its_own_way

Developing wheelchair responding to verbal commands
http://www.newsindia-times.com/ArticleText.aspx?article=03_10_2008_011_001&mode=1