egomaniac - 6:30 pm on May 31, 2005 (gmt 0)

What's cool about this from a user-perspective is that you can effectively re-run or refine your search without having to change any words and hit the search button again.

We all like to get what we are looking for the first 10 results whenever possible. Changing the slider gives the ability to refine the results without having to think (i.e. not having to think of additional words to refine the search).

Not having to think is important because everyone is too busy.