
TYPO3.org provides documentation online, using an Open Office Document Parser. A user can download the .sxw file, PDF or browse through it online. Logged in users can also annotate the documentation. Check out the list of documents that are currently available here:
The TYPO3.org Document Library
Sometimes words are not enough and for users that need more "visual" help, TYPO3 offers an impressive video library. From creating basic extensions and managing administrative tasks to editing content, there is something for both developers and content editors.
Please visit the video section on typo3.org to download them.
There are a number of mailing lists available to users of TYPO3. You can see the lists at http://lists.netfielders.de. A searchable archive of some of the lists can be found at typo3.org/documentation/mailing-lists/