Google’s Data Liberation Team announced a new open source project called “Google Blog Converters,” that allows users the ability to easily move blog posts and comments from service to service. This initial release provides Python libraries and runnable scripts that convert between the export formats of Blogger, LiveJournal, MovableType, and WordPress.
In addition, the source code includes templates for hosting these conversions on Google App Engine. Future additions to the project will include support for BlogML and synchronization tools between various services that do not provide a import/export feature but do provide APIs for accessing and modifying blog contents.
Download (source code)