Xeena won't run for me on my Mac OS X system; it can't find jre. Apple's Overview of Java for Mac OS X (http://developer.apple.com/documentation/Java/Conceptual/Java14Development/01-JavaOverview/JavaOverview.html) says JRE and SDK are bundled with the OS and Xcode Tools (which I have loaded). It says to define JAVA_HOME as /Library/Java/Home. That didn't help. Any idea how to run Xeena on a Mac OS X system?
I took a look at the xeena.sh script and found that if I edited it to replace "$JAVA_HOME/bin/jre" with "$JAVA_HOME/bin/java" then I could get the sample.sh script to work. I have set $JAVA_HOME to /Library/Java/Home. Maybe it will work for you, too?
BTW I'm using Panther (10.3) on my PowerMac 9600 thanks to a 800Mhz G4 processor upgrade and XPostFacto 3.0.