Dries Buytaert recently posted his Fields in core code sprint debrief, in which he mentions toying with the idea of organizing a Drupal.org upgrade sprint at Acquia. This is what Dries has to say:
All things considered, this [Fields in core] sprint was a big success, and I'm now toying with organizing a "drupal.org upgrade" sprint at Acquia during the last week of January. The goal would be to upgrade drupal.org from Drupal 5 to Drupal 6, and make progress on the drupal.org redesign work. Is anyone interested in participating in or helping fund this sprint? If so, more soon.
From my previous involvement and blog posts, it is probably not big news that I am very interested in helping out with that. Are you?