"The HTML5 Canvas Element is perhaps the most exciting web standard that has emerged in the last few years. It allows on-the-fly creation of graphs, diagrams, games, and other visual elements and interactive media that previously would have been impossible to construct without a plugin like Flash. This Refcard will empower you with the tools and knowledge you need to start building with the next generation of dynamic graphic web standards
Nothing like starting a week than with a HTML5 Cheatsheet... :)
I so know nothing about the HTML5 Canvas element that this cheatsheet is perfect for me.