I have just released an updated, much improved version of this review system. There is a lot automation to expediate the process of announcing new review opportunities, claiming a free book to review and getting that book immediately. If you are already a member of the reviewer group for ebooks, then I sent you an email with the link to the new reviewers page.
If you are someone who is interested in getting free books and in the near future even small payments for honestly reviewing books, please request to join the group:ucp.php?i=176
If you are a new member, I may not approve your request until you have made a few new posts and been registered for a few days.