Lo and behold, today Sony silently launched
PRSLabs.com, a site providing official tools and documents for you to create unencrypted BBeB files for the Sony Reader.
Registration is free and doesn't seem to require any prerequisites. Among the things you can find once you're registered:
- BBeB XML Format Specification
- Xylog Parser API Specification
- BBeB Metadata Guide
- BBeB Character Set
- BBeB ID Specification
- Xylog Parser (Windows DLL)
- Xylog Parser API Specification
- Sample Projects