During the Microsoft Community Summit from June 7-8, 2008, I presented the following Topic - Enterprise Library 4.0 and Unity IoC. The presentation discussed the integration of Enterprise Library 4.0 with Unity IoC and, in particular, how to use the Data Access Application Block, Logging Application Block, and Validation Application Block in a layered application using Model-View-Presenter.
I will create a screencast of the presentation in a couple of days, but in the meantime, you can find three screencasts that discuss Enterprise Library 4.0 and Unity IoC right now: