I'm the author of Jekyll and cofounder of GitHub. This is a great review of Jekyll in its infancy. We're using Jekyll as part of the GitHub Pages stack, and because Jekyll is a very young project, we're giving our customers a chance to shape the future of this feature. If, after you read this article, you find yourself trying out Jekyll and/or GitHub Pages, think about what else you'd like to see included, and if your ideas (or code!) align with our goals, I'll be happy to implement (or merge!) them in the project. I wrote Jekyll to scratch my own itch, but now that it's in use by a broader audience, I'd like to help you scratch yours as well.