randomized order in select?

Hi,

I have got a simple table like this:
       create table tips (           id integer primary key unique,           tiptext text       );

and, I've got a website where I'm willing to show these tips in a random
order. Each visitor will get a randomly selected tip. So for now, I have
to do 2 queries:
select id from tips

collect an ID list, choose one randomly and retrieve it. I wish I could
do something like:
select tiptext from tips order by random limit 1

in PostgreSQL.
-- __________
|          |
|          |  Enver ALTIN (a.k.a. skyblue)
|          |  Software developer, IT consultant
|    FRONT |
|==========|  FrontSITE Bilgi Teknolojisi A.Ş.
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