It seems like they have released a professional and developer version of the BDC metadata manager for MOSS 2007! Great work!
"BDC Meta Man makes generating Application Definitions easy due to the many features it offers.
- Easy to use Windows application
- Ability to connect to and browse multiple data sources
- No need to know how to write XML or SQL
- Integrated Shared Service Provider Administration Web Site
- Inspect your application definition and edit any part of it
- Saves enormous amounts of time and effort"
For a full overview of features per version, check out this document.