Vapor has moved it's webpage and development resources to Rubyforge.
The address for it's web page is now http://vapor.rubyforge.org/

Vapor is a persistent Object-Repository for Ruby, providing transparent persistence of interrelated Ruby application objects to a PostgreSQL database.
It's goal is to provide developers with an easy-to-use framework for persistence, that is consistent with OO design and does not interfere with the code of classes that are to be ersistently stored. Vapor does not require any knowledge about relational databases to be used, so that developers can concentrate on the task of writing their application logic.
Some of Vapor's general design was inspired by the JDO (Java Data Objects) standard.

I would like to thank the Rubyforge crew for making such a wonderful resource available. Keep up the great work.