Grails Introduction - IJTC 2007
Practical Groovy Domain-Specific Languages
Practical Groovy Domain-Specific Languages - Guillaume Laforge - Usi 2009
Writing Domain-Specific Languages in Groovy
Groovy, to Infinity and Beyond - Groovy/Grails eXchange 2009
Implementing Groovy Domain-Specific Languages - S2G Forum - Munich 2010
Practical Groovy DSL
JavaOne 2008 - TS-5764 - Grails in Depth
Designing Your Own Domain-Specific Language in Groovy by Guillaume Laforge at SpringOne/2GX 2009
Groovy and Grails in Google App Engine
JavaOne 2008 - TS-5793 - Groovy and Grails, changing the landscape of Java EE patterns
Groovy 1 7 Update, past, present, future - S2G Forum 2010
Introduction to Groovy and what's New in Groovy 1.6 - SpringOne Europe 2009
Whats New In Groovy 1.6?
What's New in Groovy 1.6?
Practical Groovy Domain-Specific Languages - SpringOne Europe 2009
Grails at Linkedin
Les nouveautés de Groovy 2 -- Mix-IT 2013
Groovy 2.0 webinar