diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..ff303fd
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,37 @@
+Contributing
+============
+
+Do you want to contribute to the bootstrap-vz project? Nice! Here is the basic workflow:
+
+* Fork this repository.
+* Make any changes you want/need.
+* Check the coding style of your changes using [tox](http://tox.readthedocs.org/), running `tox -e flake8` and
+fixing any warnings that may appear. This will be done again by
+[Travis CI](https://travis-ci.org/andsens/bootstrap-vz) later when you send a pull request, so it's better if
+you check this before.
+* Commit your changes.
+* Squash the commits if needed. For instance, it is fine if you have multiple commits describing atomic units
+of work, but there's no reason to have many little commits just because of corrected typos.
+* Push to your fork, preferable on a topic branch.
+
+By this moment, there are two paths that you have to consider:
+
+If you patch is a new feature, e.g.: plugin, provider, etc. then:
+
+* Send a pull request to the `development` branch. It will be merged into the `master` branch when we can make
+sure that the code is stable.
+
+If it is a bug/security fix:
+
+* Send a pull request to the `master` branch.
+
+Please try to be very descriptive about your changes when you write a pull request, stating what it does, why
+it is needed, what use cases do you think it would be useful, etc. You could as well be asked to rebase your
+work on the current branch state, so it can be merged cleanly. Also, be in mind that if you push a new commit
+to your pull request, we won't be notified just by this - that will happen only if you make a new comment on
+the issue.
+
+Be aware that your modifications needs to be properly documented and pushed to the `gh-pages` branch, if they
+concern anything done on `master`. Otherwise, they should be sent to the `gh-pages-dev`.
+
+Happy hacking! :-)
diff --git a/README.md b/README.md
index 9747034..bd72479 100644
--- a/README.md
+++ b/README.md
@@ -21,3 +21,10 @@ and learn [how you create a manifest](http://andsens.github.io/bootstrap-vz/mani
 Developers
 ----------
 The API documentation can be found at [bootstrap-vz.readthedocs.org](http://bootstrap-vz.readthedocs.org).
+
+Contributing
+------------
+
+Contribution guidelines are described on the [CONTRIBUTING](CONTRIBUTING.md) file.
+There's also a [topic on the documentation](http://andsens.github.io/bootstrap-vz/development.html#coding_style)
+regarding the coding style.
diff --git a/bootstrapvz/common/tasks/network-configuration.json b/bootstrapvz/common/tasks/network-configuration.json
index 4e5dce7..2937384 100644
--- a/bootstrapvz/common/tasks/network-configuration.json
+++ b/bootstrapvz/common/tasks/network-configuration.json
@@ -8,5 +8,7 @@
 "wheezy": ["auto eth0",
            "iface eth0 inet dhcp"],
 "jessie": ["auto eth0",
+           "iface eth0 inet dhcp"],
+"sid": ["auto eth0",
            "iface eth0 inet dhcp"]
 }
diff --git a/bootstrapvz/plugins/cloud_init/tasks.py b/bootstrapvz/plugins/cloud_init/tasks.py
index 90b3fde..007ad86 100644
--- a/bootstrapvz/plugins/cloud_init/tasks.py
+++ b/bootstrapvz/plugins/cloud_init/tasks.py
@@ -2,6 +2,8 @@ from bootstrapvz.base import Task
 from bootstrapvz.common import phases
 from bootstrapvz.common.tools import log_check_call
 from bootstrapvz.common.tasks import apt
+from bootstrapvz.common.tasks import locale
+import logging
 import os.path
 
 
@@ -12,7 +14,6 @@ class AddBackports(Task):
 	@classmethod
 	def run(cls, info):
 		if info.source_lists.target_exists('{system.release}-backports'):
-			import logging
 			msg = ('{system.release}-backports target already exists').format(**info.manifest_vars)
 			logging.getLogger(__name__).info(msg)
 		else:
@@ -53,6 +54,7 @@ class SetUsername(Task):
 class SetMetadataSource(Task):
 	description = 'Setting metadata source'
 	phase = phases.package_installation
+	predecessors = [locale.GenerateLocale]
 	successors = [apt.AptUpdate]
 
 	@classmethod
@@ -63,9 +65,8 @@ class SetMetadataSource(Task):
 			source_mapping = {'ec2': 'Ec2'}
 			sources = source_mapping.get(info.manifest.provider, None)
 			if sources is None:
-				import logging
 				msg = ('No cloud-init metadata source mapping found for provider `{provider}\', '
-				       'skipping selections setting.').format(info.manifest.provider)
+				       'skipping selections setting.').format(provider=info.manifest.provider)
 				logging.getLogger(__name__).warn(msg)
 				return
 		sources = "cloud-init	cloud-init/datasources	multiselect	" + sources
diff --git a/bootstrapvz/providers/ec2/tasks/packages-kernels.json b/bootstrapvz/providers/ec2/tasks/packages-kernels.json
index 1e42622..adbbf97 100644
--- a/bootstrapvz/providers/ec2/tasks/packages-kernels.json
+++ b/bootstrapvz/providers/ec2/tasks/packages-kernels.json
@@ -7,6 +7,9 @@
 	{"i386":  "linux-image-686",
 	 "amd64": "linux-image-amd64"},
 "jessie":
+	{"i386":  "linux-image-686",
+	 "amd64": "linux-image-amd64"},
+"sid":
 	{"i386":  "linux-image-686",
 	 "amd64": "linux-image-amd64"}
 }