Today the debian-cross@lists.debian.org ML was created. The rationale for having such a ML can be found in http://bugs.debian.org/717332. The description for the ML currently is:
Discuss cross building of packages and infrastructure for cross-builds
The list discusses
* How to cross-build packages within Debian
* Infrastructure needed to cross-build packages. This may include discussion about additional tags for cross-building, running cross-build daemons, etc.
* How to use cross-builds to bootstrap Debian ports.
The issue for the creation of this ML explicitly includes topics which affect Ubuntu and other derivatives. So it makes sense for Ubuntu and Linaro developers to subscribe to this ML too. Please avoid cross posting to Ubuntu a and Linaro lists, as people subscribed to debian-cross may not be allowed to post to these lists.
Please subscribe to this list if you are interested in cross build issues.
Matthias