Feature

Moderators: WordPress is looking specifically for moderators who have professional experience conducting usability tests (design agencies, software companies, usability consulting firms, etc.).
Participants: The regular Joe. In some cases WordPress will target specific behavior, like users who upload large video files. In others, they’ll be looking for users with widgets in their sidebar, users with more than one author on their blog, etc.
If you’re interested, check out the post here. WordPress is accepting moderators immediately, and is in the process of getting the registration survey ready for participants.