All Shelter 2.0 files are made available under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License. The files for the Exmore 10x18 shed are the first available for free download, but should be considered beta until more people have cut them. There have been some minor changes to a few of the parts since the first Shelter was cut, and these revised files have been checked "virtually" but not cut yet. Also the instructions are pretty rudimentary and incomplete, but will continue to be worked on and new versions will be posted regularly.
If you feel confident, even after this warning, here are the downloads available: