Henrik has published his slides for his upcoming talk at Agile 2009. They represent what I believe to be a concise, entertaining and 
complete intro to everything you’ve ever wanted to know about scrum. His book ‘Scrum and XP from the trenches‘ is usually the first book everyone reads when they want to know about scrum, so he’s had a huge impact on the community already.
Note, he is now also running for a position on the board of the Agile Alliance. You can find his position statement here. He certainly has my support.
And then, as an added bonus he has published a great scrum checklist, so you can measure the success of your implementation.
You can also follow him on twitter.
