I split the modules 'postgres' and 'pg' into two separate parts of the SVN repository, and will release them as separate gems.

'pg' is the newer module, which is a much better design. It's encouraged for use when an ActiveRecord adapter is not required (an AR adapter is coming soon though). Install with "gem install --remote ruby-pg".

'postgres' is the prefered module for existing applications that depend on ActiveRecord right now. Install with "gem install --remote postgres".