pgsql users, and schemas

so have you discovered pgsql users, and schemas yet
psql -U postgres
psql> create user newuser password 'newuser';
psql> create schema newuser authorization newuser;
psql> \q
# psql -U newuser
psql> create table foo();
psql> \d
the table is then owned by newuser user, in its own schema (like a namespace). this is somewhat how oracle user/schema owned tables are done.
this lets you have one database and then have many users within that database, each in their own schema.
this is same effect for having a different database for each project i guess.