I gleaned just one CD using Ripguard from the conference call before year end. They said the delay was in ensuring that Ripguard did not break the DVD standard (so they wouldn't be able to use the DVD logo). That compliance was only certified recently.
They claimed one studio is going to use ripguard on 100% of titles and another selectively. However, they have missed the holiday season with these 2. The one that they will protect is a blockbuster and is from a 3rd studio (a one off release it seems)