SES doc search is now live! Give it a shot.
Look for podcasts in the next week or two about the install/deployment process.
(BTW, I've seen at least one cynical comment in the blogosphere about the fact that doc is still excluded from external search via robots.txt. This is true, but only because we are doing load testing before opening up doc to search by the Google masses. These exclusions will be removed when that testing is complete.)