I agree that Kanban is too narrow and Lean is a bit too wide. However, I am much closer to the lean end of the continuum.
I love Don Reinertsen's Principles of Product Development Flow. It covered a large part of Lean, but is very focused on the queueing part of lean that is associated with R&D organizations. He makes a big point in this book about why the dynamics in the application of lean in R&D is so different than the application in Manufacturing. On the opposite end of the spectrum, the Lean.org covers R&D, Manufacturing, Health Care and Service industries.
Some sub-ideas could be:
- Lean R&D
- Lean Product Development
- Lean Software & Systems
I look at the success of programming.stackexchange with a wide scope and great tags. I really feel like Lean.stackexchange could work would work better than any of the ideas in the list above.