After several months of reorganising, tidying up and adding documentation of new features, I'm pleased to announce that the Moodle 2.1 English documentation wiki is now available - http://docs.moodle.org/21/en/ A big thank you to everyone who has helped.
'Moodle Docs for this page' links in Moodle 2.1 now redirect to the 2.1 documentation, just like links in Moodle 2.0 and 1.9 redirect to the 2.0 and 1.9 documentation respectively.
The 2.1 documentation wiki was created by copying the 2.0 wiki, with the exception of talk pages. We'll soon be copying the 2.1 wiki in order to create the documentation wiki for Moodle 2.2. Also coming soon is a new wiki theme to improve the page layout, particularly for users with smaller screen sizes. Please see MDLSITE-1511 for details.
The documentation is, as always, a work-in-progress and help improving it is always welcome. If you'd like to help out, please see Category:Pages needing improvement for a list of pages needing some attention.