auto_increment?

Hi.
I recently had to port a script from using Postgres to MySQL.
In Postgres, when I have to use a unique id, I create a sequence
and call nextval('sequence') each time I insert a new line in the table.
MySQL doesn't have sequences (as far as the documentation shows).
So I had to look for an alternative. I found an atribute "auto_increment"
which seems pretty interesting. If I do
CREATE TABLE table (
id int4 primary key auto_increment,
name text,
email text);

It automatically assigns the next value when I do
INSERT INTO table (nome, email) values ('My name', 'me(at)somewhere(dot)com');

When I noticed MySQL didn't have sequences, I cursed a lot. When I
found this out, though, I kept wondering if Postgres also had it, but I
couldn't find any mention in the documentation. Does anyone know if something
similar exists? Am I doing thins the hard way? Is there any other way of
automagically getting unique ids?
TIA,

rbp

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