I'm not into cloaking anymore, but I'm wondering about using AJAX. Have your bot content in your actual HTML document, but have a javascript file pass the keywords or whatever to a server side script, then replace the entire document with the HTML that's returned. I don't think the SE's could detect that, but I could be wrong.

sound interesting ... but is easily dedectable ... people just have to turn javasript off in their browsers ;-)

AJ only works from the originating domain. You can't load content from other domains. FF3 allows cross-site usage of AJ but requires a special header from the site you're loading from and no one uses them yet.