For ISVs wanting to update legacy applications or for new green field development, ADO.NET Entity Framework 4 has become a time saving, cost effective way to build out your data tier of your application. Entity Data Model (EDM) provides a uniform way for you to work with data by specifying the data structure of a client application through business logic, namely entities and relationships.
When I was a kid, my Dad was in the Royal Air Force. When he came home and said he'd got a posting, it meant we were going off to live in a foreign country for a few years. Of course, today, a posting is just something on a blog - rather like this one. However, in this particular case, the double meaning is actually applicable.