Porting from Oracle PL/SQL

While doing a Google search recently, I found a nice site located at
http://www.redhat.com/docs/manuals/database/RHDB-2.0-Manual/prog/plpgsql-porting.html.
The number and quality of Postgres related book titles has grown, and greatly
improved over the years. With the increased popularity of Open Source
databases, has anyone given any thought towards publishing a title focused on
migrating apps from Oracle to Postgres? Or maybe a title focused exclusively
on PL/pgSQL? It's just a thought, no criticism whatsover. Good day.