The inference group Dasher site
My main work in HCI has been on Dasher.
Dasher - an efficient writing system for brain-computer interfaces? (pdf), S. A. Wills and David J. C. MacKay. IEEE Transactions on Neural Systems and Rehabilitation Engineering 14 (2), 244-246 (2006). [see also the brain dasher page]
David Ward's Dasher site and experimental results