Migrate INotifier to support async implementations, messaging when getting Part InvalidCastException, Lombiq Hosting - Tenants demo, and many more coming this week! Do you want to know more? Then don't forget to check out our current post!
Bertrand Le Roy's not-so-recent article "Orchard Extensibility" in MSDN Magazine explains the various aspects of - surprise - extending Orchard. The article mainly covers Orchard's content model, its concepts and flexibility: something we all love in Orchard. Bertrand also lists some other important parts of the Orchard API, all worth knowing.