I've posted the current EntLib4 product backlog with prioritized stories on Codeplex: http://www.codeplex.com/entlib/Wiki/View.aspx?title=EntLib4%20Backlog 

There are two main areas we are working on: introducing the dependency injection block (which I blogged about in my previous post ) and making enhancements to the existing blocks.  As always, community feedback is welcomed.

-- Grigori