The long wait is over, Messiah:animate is here. Some of the new features include: powerful new non-linear animation and editing system, faster bone deformation, faster cloth dynamics with more options to create stunning soft body effects, interactive creation of muscles, the ability to transfer bones to different skeletons, points to different curves, etc., the ability to use a combination of Bezier and TBC curve types on the same motion curve and more automatic and seamless connections with other applications such as 3ds max. Messiah:animate has a SRP of $1045 and is part of the Messiah:studio package.
No word yet on Messiah:render, but it seems to have diverged quite a bit from Arnold.