Current stable releaseThe latest stable release, 3.3 can be downloaded direct from the google downloads section. This release was made on 08-12-10.
Source code downloadSource code can be downloaded direct from google at the downloads section.
Quadrics releaseThe latest stable release from Quadrics is version 2.2 was made on the 16th March 2009 and at the time of writing is downloadable from their website in the QSNET2LIBS package. No further releases are expected from quadrics at this time.
Development and Subversion accessSubversion access to padb is hosted by google where you can browse the source online.
Alternatively to checkout a read-only copy of the source run the following command from your machine.
svn checkout http://padb.googlecode.com/svn/trunk/ padb