I don’t have that problem. I have for exmlape installed the Quartz plugin (right-click on project -> Grails plugins…) and in my controllers I can access all quartz classes, which I couldn’t before I installed the plugin.
There are lots of information about latest technology and how to get trained in them, like this have spread around the web, but this is a unique one according to me. The strategy you have updated here will make me to get trained in future technologies. By the way you are running a great blog. Thanks for sharing this.