alter default privileges problem

v9.1 on linux

Connect to postgres DB, then...

create user "select" password 'select';

create user "insert" password 'insert';

alter default privileges for user "insert" grant select on tables to "select";

alter default privileges for user "insert" grant select on sequences to "select";

alter default privileges for user "insert" grant execute on functions to "select";

Disconnect.  Reconnect as user "insert", then...

create table foo (a text);

insert into foo (a) values ('aaa');

Disconnect.  Reconnect as user "select", expecting to be able to select contents of the "foo" table, but fails with "permission denied for relation foo".

Bottom line is that I want the "select" user to be able to query any table, sequence or use any function created by user "insert".

Thanks for any help !