Line Rider
One of the greatest, simplest examples of *great* HCI design, as judged by Bill Buxton is a little flash game called Line Rider. For anyone who designs anything, I suggest you give it a try if you haven't already.
Press Release: Long-range eye tracker enables selling ads “by the eyeball”
Queen’s University spin-off Xuuk unveils technology today at Google May 7, 2007 KINGSTON, Ont. – A Queen’s University Computing professor’s invention – to be unveiled today at Google’s corporate headquarters in California – provides a unique, affordable way for advertisers to track the effectiveness of their messages by measuring how many people are looking at their billboards and screens.