Mims Wright has released an open-source animation library for Actionscript 3. This has a lot of promise. From the author:
KitchenSync was designed for developers who want a smart way to handle animation or other time-based functionality with code. Written from the ground up in ActionScript 3.0, KitchenSync relies on smart object-oriented architecture rather than complicated shorthand. It includes a number of features and shortcuts, such as the clone() method, that save effort for developers. KitchenSync makes extensive use of events and informative runtime errors and is quite flexible when it comes to extending the functionality.
This philosophy makes me think that KitchenSync will fit in nicely with pureMVC.

Thanks for the link. I think you’re going to love it. If anyone has any questions or comments on KitchenSync, I’d be more than happy to address them!