Migration/Upgrade from Commons 6.x-2.10 to 7.x-3.0

Until a possible Commons D6 -> D7 upgrade path, for now there is the new module Drupal-to-Drupal data migration, based on Migrate. Some info:

Drupal-to-Drupal data migration - Part 1: The basics
Drupal-to-Drupal data migration - Part 2: The architecture

Given that the schema for the D6 Commons is known, it seems like an approachable task to create a set of migration classes that can port (much of) an existing Commons site to the new platform.

I'm marking this as a feature request.

It would also be great if anyone could post some documentation, if they have had experience using the D2D module to port a Commons site from 6 to 7.

We'll be attempting an upgrade in a dev environment locally in a month or so, will keep notes and report how it goes. We have a decently active corporate internal Commons 6 now but eager to get to Commons 7 as D7 is so much nicer and we really like the layout and features of Commons 7 too.

You can get updates by checking out this sandbox:
http://drupal.org/sandbox/nateswart/1946220

Quick details:
- using wizard_api branch of migrate
- extending migrate_d2d classes
- some updates made to wizard_api to handle encrypting stored db credentials
- added ability in wizard_api to mark desination fields as DNM in UI

Marking postponed until that work is done. Luckily there is a bunch of active work going on, but we don't have any concrete timelines yet.

Project at https://drupal.org/project/commons_migration - been doing some testing, more people, more activity needed to keep things moving.