converting timstamptz to local time zone

How can I "select ('2006-01-01 9:00:00+02' at time zone 'GMT')::timestamp;"
where instead of GMT it has the local time zone of the machine I am running
it on (which varies between my machines)?
I dont want to hard code the timezone of the machine into the query.. I want
to pick it up from the environment, but cant figure out how :-(

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Peter Nixon
http://www.peternixon.net/
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