The recently released BlogEngine.Net is a full-featured yet simplistic tool that satisfies most bloggers' needs. Until the BlogML idea is supported by bot BEN and other blogging tools the nature of the beast dictates that exporting must take place. To make it easier for bloggers to make the switch to BEN, this export application has been created.
The first release of the BEN Exporter supports only the MovableType 3.2/4.0 blogging tool. However, the BEN Exporter framework supports a Provider-based approach to the pluggability of custom Export providers! So, if your blogging tool - Blogger, for instance - has an API that will allow for the retrieval of your entire blogging history or archives you can easily write your own ExportProvider implementation.
If you're interested in helping out with this project or in writing new providers, feel free!
These details are provided for information only. No information here is legal advice and should not be used as such.