A few days ago Károly Négyesi (known to most as chx) announced that he organizes a (virtual) cirtical issue queue cleanup event for the 3rd of November, in which people gathered on the #drupal IRC channel will focus on fixing bugs in the critical issue queue.
webchick, desbeers, dvessel, davidstrauss and myself will spend part or all of November 3 with one goal in mind: empty out the critical issue queue for Drupal 6. In case we reach this goal and we have more time, well, there are a number of noncritical bugs and an even bigger number of patches that need work. Come, join the fun on #drupal on irc.freenode.net [...]
A few hours ago, Raincity Studios also announced that they are organizing a (real life) event for the 31th of October, titled the Disguised Drupalist Debugging Day. The Raincity event involves snacks and lots of help even for people starting to get their feet wet in patch rolling.
At last but not least, people from the Netherlands organize their first DrupalJam event for the 16th of November, which additionally to hosting sessions also includes a translation sprint, which admittedly is not direct code getting into Drupal 6, but nonetheless a very good opportunity for people to test every corner of Drupal 6, while translating them, and at the same time using the localization tools heavily, giving them some boost.
Things seem to line up nicely, and seeing Drupal 6 getting more and more stable by the day is very gratifying. In related news, the Drupal 6 development version is so stable, Angie Byron (known to most as webchick) just started her blog site on this version.