Hi, since PDB is a read-only database and very much incomplete, may I suggest that we use a copy of RAA instead ? It's the database of packages for the Ruby language (http://raa.ruby-lang.org/).
I think RAA's web engine is freely available, so if there is interest, I could find the code, and it could be installed on one of the main Pd sites, and people would fill it with listings of Pd's externals instead of Ruby's externals.
Alternatively, Alex or I could install it on http://artengine.ca/ ...
Mathieu Bouchard http://artengine.ca/matju