Some great discussions on moving from 4-week to 2-week iterations, ways to improve backlog management, how to grow a scrummaster (so you can move on), and a bit about Hackathons (https://www.diigo.com/user/mkilb…) and Lego Serious Play (http://www.seriousplay.com/)
For those first 2 discussions, some other great ideas are in this blog post on how to use Kanban for Scrum improvements http://yuvalyeret.com/2012/04/2…
I’m thinking I might even do a Scrumban lightning talk now. 😉