I’ve been working MVP for a day now and I just love it. Complete seperation of data and user interface. I’ve been creating 2 models, one built with Ado.NET (which sucks by the way) and one built with Hera (the ORM tool at work).
I found a few ways to implement MVP though. Some still have a reference from the View to the Presenter. I removed this reference by using events on the View that the Presenter listens on.
By using Rhino.Mocks I also created a complete test case for my presenter with a mocked View and Model to check that everything goes as it should.
This is actually the first program where I could test a program with a user interface 
I’ll see that I can post some information later today and put up the code for anybody who wants it.