We've just released Grails 1.0.3, which includes 230 issues resolutions and improvements since the last release. The release notes go through the full details, including outlining some of the new features like enum support and interactive mode.
Grails has come a long way, since the release of 1.0 Grails has been downloaded over 186000 times averaging out to around 50000 times per month. That puts it on par or not far behind some of the biggest open source projects like Spring, Hibernate and Struts in terms of downloads.
The most exciting thing for me though is the plug-in community with over 70 plug-ins in the repository some of the new ones include Axis 2 support, Java2D with GraphicsBuilder and profiling (contributed by one of the biggest Grails users LinkedIn) and debugging plug-ins. Awesome stuff.
Now I'm shifting my focus to the second edition of the book, and feature development for Grails 1.1.