question about selecting across multiple dbs

Hello,
I see that there is an item "Queries across databases or servers (two-phase commit)" on the todo list's urgent header. I have tried asking this question on the other lists and have not yet gotten a suitable answer to this question...When is this functionality expected to be available in PostgreSQL? I as well as many others want to be able to run queries such as

SELECT a.field_a, b.field_b FROM user:pwd(at)host(dot)database(dot)schema(dot)table_a AS a NATURAL JOIN local_table AS b;

Thanks in advance,

-Joe

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