What Super Autosuggestion (for the record we are officially claiming this term 8-24-2010) does is return search results onkeyup. The entire page changes when the user releases a key. This must be hell on resources, but I’m guessing with its thousands of data centers can handle the requests.
This feature is still in testing, so maybe they will roll it out, and maybe they won’t. Here is a small video someone uploaded to YouTube showing the features.