Xtext comes with an Eclipse Help Plugin and therefore supports help directly in your Eclipse IDE. Goto "Help" and "Help Contents" to activate this view. If you want to read the offline or without Eclipse you can refer to the same content either as HTML or PDF.

Tutorials

Reference Documentation

0.7.2 (Latest) HTML PDF
0.7.1 HTML PDF
0.7.0 HTML PDF
FAQ on the wiki

Webinar

Webinar on Xtext: Developing Domain Specific Languages

Sven Efftinge, Heiko Behrens
July 2009, Eclipse Webinar
slides, webinar recordings, blog post

Presentations

You will find the slides of many talks about Xtext at slideshare. The following list is just an extract:

Building DSLs With Eclipse

Peter Friese
August 2009, Eclipse Day at the GooglePlex in Mountain View, CA
slides, video, blog post

Xtext: Developing Domain Specific Languages

Heiko Behrens
June 2009, Democamp in London
slides, video, blog post

Workshop on Xtext

Moritz Eysholdt, Sebastian Zarnekow, Jan Köhnlein
June 2009, CodeGeneration Conference
slides