Many people know that Grails is based on Groovy, Spring, Hibernate, etc., but how are all these tools and libraries knitted together? How, when it comes down to it, does Grails work? This talk will cover several areas of Grails, looking at the most important classes and how they fit together. Find out about the build system, plugins, GORM, and HTTP request handling, amongst others.
http://skillsmatter.com/podcast/java-jee/grails-internals

Guillaume Laforge and Graeme Rocher talk about the new features in Groovy 1.7 and Grails 1.2, how Groovy and Grails are related to each other, and how the acquisition by SpringSource has affected their development.
http://www.infoq.com/interviews/Groovy-1.7-Grails-1.2

How is your lone web server going to handle all the traffic you’ll get when it lands on Slashdot or the front page of Digg? Probably not well. To prepare for all of this popularity you’re going to need multiple servers, but there’s more to it than buying hardware.
Watch this video on Skillsmatter.com

Adobe Flex is a Rich Internet Application framework that allows developers to build robust and powerful applications for the web and the desktop. In this talk, Tomas Lin discusses the major technologies and tools available within the Grails / Flex ecosystem and dive into building a simple and fun application using the Flex plugin, BlazeDS, Grails and Flash Builder 4.
http://skillsmatter.com/podcast/java-jee/building-killer-rias-with-flex-and-grails

The next major version of the Groovy Eclipse Plugin is built on a new builder technology, where the Eclipse JDT Compiler has been extended to seamlessly integrate groovy compilation. This gives developers a totally new experience working on Groovy and Java code in Eclipse as most UI features “just work” out of the box. Building on top of the greatly improved incremental Groovy Eclipse Plugin, recently the first version of Grails tools was integrated into the free SpringSource Tool Suite. This session will introduce the tools and show how you …

GWT is a powerful toolkit from Google that enables you to create rich and dynamic user interfaces for the browser using Java. There’s no need to learn a new language (Javascript) and you can keep your existing Java IDE and tools.
http://skillsmatter.com/podcast/java-jee/create-slick-uis-for-your-grails-apps-with-gwt

Graeme Rocher introduces Groovy and its corresponding web framework, Grails, followed by a code writing demo intended to highlight the advantages of using Grails over Java EE in order to develop web applications.
http://www.infoq.com/presentations/Web-Development-Grails-Graeme-Rocher