I’ve grown to love Markdown as well. We originally chose Textile at the Assay Depot , but I think we’ll be changing everything over the Markdown in the near future.
You can think of Markdown as a radically simplified and far more human readable form of HTML. I have grown to love Markdown over the last few years. If you’re a programmer of any shape, size, or color, you can’t really avoid using Markdown, as it’s central to both GitHub and Stack Overflow. For that matter, my new project uses Markdown, too.