Thanks to Nixit for posting this online tool...has possibilities.
"WikiMindMap is a tool to browse easily and efficiently in Wiki content, inspired by the mindmap technique. Wiki pages in large public wiki's, such as wikipedia, have become rich and complex documents. Thus, it is not always straight forward to find the information you are really looking for. This tool aims to support users to get a good structured and easy understandable overview of the topic you are looking for."
Will quickly suggest and display related topics and keywords for discussion/questioning or as a starting point for further research/exploration.
More visual search engines here
...screen shot results of a search on New Zealand.