Some guys on here will know Nicholas Jitkoff as the developer of Quicksilver. He has since gone on to develop a new search application for Google.
You can get it at the link below.
http://googlemac.blogspot.com/2009/0...earch-box.html
There is also a mention of the preview at Ars.
http://arstechnica.com/journals/appl...ick-search-box
Regards