Jane has posted more information about the potential .org projects:
https://wordpress.org/support/topic/415075
The specific projects and scopes are still being tightened up, so there isn’t a list of specific tasks, yet.
If you’re interested in a specific project (or contributing in general), leave a comment on the developers blog (http://wpdevel.wordpress.com/2010/06/24/hiatus/). There will be more on specific tasks soon!