Forum Moderators: not2easy
How would you have them search? By keywords? There has been a number of discussions on the WebmasterWorld forums over the years regarding Site Search [google.com], maybe you'll find something in there that interests you?
[picosearch.com...]
They have a free product that has limited features but it works fine for most sites. Also, I have used:
[atomz.com...]
They also used to have a free service that worked pretty well, I also think google has a free site search as well (I'd go with Google if I were you if your looking for free).