If you are running a PHP webpage, then I know of a really clever way to direct all robots to a specific "robot Page" where you can create a page with a whole bunch of search terms, links, and whatever. This is especially easy to do if the IP of the robot is the same every time. I believe the script to do the aforementioned was downloaded from the PHPBuilder website. The nice thing about the php page is that it doesn't actually "redirect" it just creates the HTML page on-the-fly.
LF
"As far as the laws of mathematics refer to reality, they are not certain; as far as they are certain, they do not refer to reality."--Albert Einstein