Carl and Richard talk to Chris Patterson about MassTransit, an open source enterprise service bus. The conversation starts out talking about service bus in general, how the patterns around a service bus make it easier to build large, multiversion applications with the fewest dependencies possible. Chris sets MassTransit in context with large, expensive service buses like Biztalk. He also digs into some of the other projects he's worked on, including TopShelf (for building Windows services) and Magnum (the mother of all toolkits). The boys also ask Chris about his focus on open source, the advantages and disadvantages around licensing, pricing and support. Amazing smart guy with some awesome code!