title: How does Google Instant work?
body: <p>Any ideas on exactly how the new google instant search works?  It seems to just be AJAX calls to the old search, but it's pretty hard to simplify Google that much.  Anybody have speculations?</p>
  
  <p>EDIT:
  I know there is AJAX sent with each keypress, but is it predictive?  Or do you think it's just a regular ol' google search?</p>