The Guardian News Feed plug-in enables you to publish articles by the Guardian directly to your blog.
Click 'Get a Key' on the Guardian's Open Platform web site here: http://www.guardian.co.uk/open-platform
You will need to register, tell us about your blog, and agree to the Terms and Conditions. You will automatically receive a key which can then be used to enable this plug-in.
The FAQ for the Open Platform is located here: http://www.guardian.co.uk/open-platform/faq
And there is a Google Group where you can post questions here: http://groups.google.com/group/guardian-api-talk