summary of new features in JDBC 3.0

This is probably asking too much, but I was wondering if anyone could
assign a current perceived priority to each of the new features
introduced in JDBC 3.0 in terms of whether and when they will be
supported by the PostgreSQL JDBC driver.

The list has been lifted from Chapter 3 of the spec:

* Savepoint support
* Reuse of prepared statements by connection pools
* Connection pool configuration
* Retrieval of parameter metadata
* Retrieval of auto-generated keys
* Ability to have multiple open ResultSet objects
* Passing parameters to CallableStatement objects by name
* Holdable cursor support
* BOOLEAN data type
* Making internal updates to the data in Blob and Clob objects
* Retrieving and updating the object referenced by a Ref object
* Updating of columns containing BLOB, CLOB, ARRAY and REF types
* DATALINK/URL data type
* Transform groups and type mapping
* Relationship between the JDBC SPI (Service Provider Interface) and
the Connector architecture
* DatabaseMetadata APIs

Thanks,
Vadim