The best reference I can give you is this help page:

Working with Databases

The best advice I can give is that, yes, you can connect to PostgreSql, and that yes, there are tools for converting binary data into other readable formats. I cannot confirm whether that ODBC driver for PostgreSql will allow Iguana to retrieve the binary data.

Casey Trauer,
Director, Client Education
iNTERFACEWARE