We had a whole bunch of folks who've had their hands in the world of MediaWiki parsing & rich text editing here at the Berlin Hackathon, and made some great progress on setting out some ideas for how to start actually working on it.
Tomorrow I'll distill our session notes into a clearer description of the core ideas & next steps (dare I say... a manifesto? :)
In the meantime, if you're brave you can peek at the raw session notes: http://etherpad.wikimedia.org/mwhack11Sat-Parser
We're reviving the wikitext-l mailing list for people interested in the project; it's gotten some traffic about interesting projects but we'll be making it an active working group. I'll also be making regular posts here on wikitech-l, on the Wikimedia tech blog, and on the wikis -- but I don't want to clutter wikitech-l *too* much with the nitty-gritty details. ;)
Project hub pages will go up tomorrow at http://www.mediawiki.org/wiki/Future
-- brion vibber (brion @ wikimedia.org / brion @ pobox.com)