I don't see the events module as anything worth tapping into. What I'd like to see BC do is rebuild each of the modules using Web Apps as the platform. With each of the modules (referring to the modules section, not ecommerce, etc.), they are already basically web apps with just one or two special features anyway. If BC adds those special features to the web apps module, and then rebuilds the existing modules on that framework, we will have a very consistent API, not to mention a lot more power to actually extend modules in the future.
This is my biggest dream for the future of the system. cristinel@adobe, if you are listening, this is the best thing you could do for BC. It would be BC.Next.Damn!