I've been trying to maintain a list of upcoming Triages on http://www.mediawiki.org/wiki/Bug_management/Triage and, for those who find Twitter or Identi.ca feeds useful, you should check out Sumana's new @meediawikimeet feed (http://identi.ca/mediawikimeet, http://twitter.com/mediawikimeet).
From the page on MediaWiki.org, here is a list of the next three triages
planned:
* September 28: wikibooks * October 5th: (planned) fund-raising * October 19th: (planned) mobile
Thanks,
Mark.