We're preparing for a 1.0 release at XP Day London (http://www.xpday.org/) on 29 November. I've filed a number of minor issues planned for inclusion in the 1.0 release (see those starting "1.0:" at https://github.com/youdevise/narrative/issues). Suggestions or assistance welcome.
Scriptwriter (which produces nice HTML from Narrative-style tests) is turning out to be a more substantial effort than we'd thought, so will become a separate but related project with its own release schedule (and it will not be ready for 29 November). Among other things this means we can use Narrative to test it, so we can use it as our most mature example of Narrative usage.