I've actually written my resume in markup for a while just so that I could put it on a nice dynamically driven site. Sort of a fun weekend project (no, it's not hosted anywhere).
While I strongly doubt that this will ever be a standard, I think it's nifty, and potentially useful. It opens up easy, pretty resumes, which the world really needs (Note: I'm not being sarcastic. The number of mountains-of-text word document resumes I've gotten in the past few weeks is too high).