Hi Robert,
both PostgreSQL datatypes AND php-PostgreSQL backend are freshly
submitted as files in this google group. You can either download them
directly from
http://groups.google.com/group/wwwsqldesigner, or wait
for me to commit them in SVN. I will do this next week.
FYI: WWW SQL Designer uses a concept of pluggable DB definitions, so
there is no need to actually "add another button" - one just installs
the relevant datatype definition file and then picks the DB in Options
screen. Please refer to documentation if this is not clear.
Ondrej Zara