Lean Camp is an unconference on topics as Lean Startup, Lean UX, Design Thinking, Product design, etc.
I like unconferences as each attendee has the opportunity to participate (you can propose a topic), and the interactivity is really high.
I participated in a discussion on integrating UX in agile development team; and how to maximise learnings from serious games – for example Playing Lean.
Some great sketch-notes were made by participants on my session on “How to integrate Lean UX in agile development”: