This has been on my 'To Blog About' list for a while but I have been a bit snowed... Something I didn't know about MindManager is that it not only stores it files as XML, but it provides a native method of adding XSL transforms to import or export any XML file.
From the official Mind Manager Blog:
One of the seldom-discussed feature of MindManager X5 Pro is the ability to read and write XML files. XML is a text-based self-defining data format that MindManager X5 is built upon. In MindManager, this XML-reading and writing feature is called Transformations and registered transformations appear as file types in the File Open and File Save-As dialog boxes.
This makes MindManager much more the a powerful tool for mind mapping - which it already is anyway. It makes it, potentially, into a platform that can be used as part of an integration solution. Very cool.