Cloaking Detection?

drcrja asks: "I am conducting some academic research on the use of cloaking and how it affects search engine rankings (cloaking is the practice of delivering a specially optimized page to search engine spiders while delivering a completely different page to the user). I am currently using Alta Vista's Babel Fish to retrieve pages and compare those pages to the pages on the actual web sites but I am trying to find other methods of detecting cloaking. I am wondering if any members of the /. community have any experience with this?"