OK so my next Android app is called XML Viewer, as far as I'm aware it is the only tool for viewing XML files on the Android Market.
Please do check it out:
XML Viewer is a tool for viewing and exploring XML files on an Android device.
- Scroll through XML files in a clear and innovative way
- Expand or collapse elements to view or hide child elements
- View the raw XML file
An XML Viewing tool to help you be more productive on your mobile device!
For more information http://www.intelligent-architectures.co.uk/mobile/XmlViewer.html