Grails has been updated to 1.0.4. It will be available in the next revision of Macports.
To Install Grails on the Mac, do as follows.
1. Install MacPorts
sudo port install grails
3. Open a terminal window and edit your profile file
type sudo nano .profile
change it so it looks like this,
export PATH="$PATH:/opt/local/bin:/opt/local/sbin:/Users/tlin/grails/bin" export JAVA_HOME="/System/Library/Frameworks/JavaVM.framework/Home" export GRAILS_HOME="/opt/local/share/java/grails"