The example diagram below is the result of running groovy antmap.g > build.mm over the build.xml for my groovy shell called grash

A code snippet is below, which I've added to the groovy examples bundle (which is full of cool stuff b.t.w.)

#!/bin/env groovy
# 
# convert an ant build file into a format 
#     suitable for http://sf.net/projects/freemind
#
# by Jeremy Rayner - 2 Dec 2004
# inspired by Sam Newman 
#    ( http://www.magpiebrain.com/archives/2004/12/02/antgui )
#
# usage:   groovy antmap.g > build.mm

import groovy.util.XmlParser
import java.io.File

buildFileName = "build.xml"  // default

// handle command line params
if (args.length > 0) {
buildFileName = args[0]
}

// header
println "<map version='0.7.1'>"
project = new XmlParser().parse(buildFileName)
name = project['@name']
println "<node TEXT='${name}'>"
level = 0

printChildren(project,level)



def void printChildren(node,level) {
level++
node.each {
name = huntForName(it)
if (name != null) {
if (level > 1) {
println "<node TEXT='${name}' POSITION='right'>"
} else if (it.name() == 'property' || it.name() == 'path' ) {
if (it.children().size() > 0) {
println "<node TEXT='${name}' POSITION='left' FOLDED='true'>"
} else {
println "<node TEXT='${name}' POSITION='left'>"
}
} else if (it.children().size() > 0) {
println "<node TEXT='${name}' POSITION='right' FOLDED='true'>"
} else {
println "<node TEXT='${name}' POSITION='right'>"
}
}
if (it.children().size() > 0) printChildren(it,level)
if (name!=null)println "</node>"
}
}

// footer
println "</node></map>"


def String huntForName(node) {
preferNodeNames = ["junitreport"]
if (node == null) return null
if (preferNodeNames.contains(node.name())) return node.name()
if (node['@name'] != null) return node['@name']
if (node['@todir'] != null) return node['@todir']
if (node['@dir'] != null) return node['@dir']
if (node['@refid'] != null) return node['@refid']
return node.name()
}