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Some people are noticing Google referrals from search strings that look like:
https://www.google.com/evaluation/search/rating/task-edit?task=XXXXXX
This comes from Google's http://eval.google.com/ which only available to those part of the "EWOQ group." SearchBistro has a ton of details with demos of it in action named Google Secret Lab, Prelude.
There is some old forum discussion on it at Search Engine Watch Forums.
When I tried accessing one of the referral strings I was prompted with a 403 forbidden code saying:
ForbiddenThe user [username]@gmail.com is not a member of EWOQ. Please contact the ratingprojects@google.com for access.
Forum discussion at Search Engine Watch Forums and Google Blogoscoped Forums.
