You can clone with
HTTPS or Subversion.
With Django supporting Backends for email sending in 1.2, this can be exposed as a Email Backend, so that import statements do not need to be changed.
First shot at this.
A different attempt - http://github.com/spookylukey/django-mailer/commit/fada4e1b470af16e5c86f3ef59ce68af5f55e67c
It depends on some large changes to django-mailer I've made in my fork.
This has been fixed in pinax/master http://github.com/pinax/django-mailer/commit/fada4e1b470af16e5c86f3ef59ce68af5f55e67c