To me this post explained a lot of the legal side of the issue: <a href="http:&#x2F;&#x2F;www.zdziarski.com&#x2F;blog&#x2F;?p=5645" rel="nofollow">http:&#x2F;&#x2F;www.zdziarski.com&#x2F;blog&#x2F;?p=5645</a> I think it may have been on HN earlier.