PostgreSQL and distributed transactions

Hello everyone,
I saw a question about PostgreSQL and distributed transactions in the mail
archives. But it looked a bit old. I am hoping things have changed and
hence this mail.
We have a database for 'Admin' which will be one PostgreSQL server. We
have different servers for our 'Clients'. We did the design that way
because clients and related data may run into huge volumes. As far as the
application use by clients are concerned, the request will be redirected
to any one server (where the particular client's data resides) and we are
OK.
But the initial setup for the client is done by 'Admin' and in that
work-flow, we need distributed transactions. The transaction will start
from the 'Admin" server, do some inserts on the 'Client' server and then
either rollback or commit on both the servers. Is it possible to do this
with PostgreSQL? Any helpful links?
Thank you,
Jayadevan

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