PostgresqlDataSource

I keep seeing references to org.postgresql.PostgresqlDataSource but I've
checked all the latest pre-built JDBC jars from
http://jdbc.postgresql.org and can't find it. Is this class not ready
for "prime time" yet? Or do you have to get the source and build
manually to get this class?

Also, is JTA/JTS supported yet? I've seen a post
(http://archives.postgresql.org/pgsql-jdbc/2002-06/msg00118.php) that
indicates this is tied to PostgresqlDataSource, which is why I'm asking
about the class. Does anybody have any indication on how solid this
support is?

I'm building a simple JTA interface impl to go with the postgresql
connection's so that it basically causes the connection to be reused,
but I'd love to go with a prebuilt solution that implements the entire
range of JTS/JTA features from the pros.

Thanks,
John Pelly