After watching it install about half of CPAN are prerequisites and finally being galvanised into going thru the pain of installing libgd and GD.pm I finally got to try it out. And it seems like a pretty useful piece of code. It translates SQL DDL between various storage formats. That might be actual DDL code (in various dialects) or perhaps XML or YAML. It'll even have a good stab at drawing a picture of your database (that's what it needs GD for).
I'll be adding it to my standard toolbox.