Structuring an application

4/2 Update:

ThoughtWorks has offered to host. Date is set for 4/18.

Update:

I can show you how I added MVC to a legacy WebForms app, pushed down EntityFramework to the data tier, separated my business logic, and wired the various components together with Unity, MEF, and AutoMapper. This is just one way, so I'd love some feedback and to hear how you organize your code. I still need a location, so is there anyone able to volunteer their conference room?

Original:

The last meetup identified a potential discussion topic: how to structure an application. To talk about things like Separation of concerns, Tiers/layers, Where things like dependency injection containers, automapper, and entity framework fit in... To be scheduled only if there's enough interest. A venue is also needed.