I propose that Stack Exchange, GitHub, Meteor, Reddit, and any other company with lots of traffic and a strategic investment in Markdown, all work together to come up with an official Markdown specification, and standard test suites to validate Markdown implementations. We’ve all been working at cross purposes for too long, accidentally fragmenting Markdown while popularizing it.
His goals are admirably humble.
I don’t want to extend Markdown by adding tons of crazy new functionality, or radically change the way it currently works, or anything like that. I’d be opposed to such changes. I just want to solidify and standardize the simple, useful version of Markdown that is working so well for everyone right now.