Hi,
I just tried out the 9.1 driver (build 900) and noticed that it does not yet return the correct type for foreign tables.
I have created a foreign table using the wrapper for text files (using the example here: http://www.depesz.com/index.php/2011/03/14/waiting-for-9-1-foreign-data-wrapper/comment-page-1/#comment-33414), and when using DatabaseMetaData.getTables() the returned type for that table is null. I assume that should contain "foreign table" to be inline with psql's display.
The same is true for DatabaseMetaData.getTableTypes()
I just wanted to mention it, to make sure that it's not forgotten ;)
Regards
Thomas