Simple markup
Timothy Appnel: I have a new appreciation for the elegeance and simplicity of XML markup. Not that I didn't have one before its just grown the size of the Empire state building and illuminated in neon.
Obviously, I'm currently embarking on a similar mission, and share Tim's appreciation for XML. My goals, however, are much lower than Tim's: I'm not trying to create a full markup language. I'm applying 80/20 whenever I can: e.g., unordered lists are enough. The times when full functionality is required, I'll personally use full XHTML.
I'm currently looking into textile for inspiration.