I just began to learn rules with 6.5 and notice:
test=> \dt
Database    = test+------------------+----------------------------------+----------+|  Owner           |
Relation            |   Type   |+------------------+----------------------------------+----------+| megera           |
access_log                      | table    || megera           | hits                             | table    || megera
        | junk_qwerty                      | table
|+------------------+----------------------------------+----------+
test=>  create rule log_hits as on update to hits  do instead insert into hits values ( NEW.msg_id, 1);
CREATE
test=> \dt
Database    = test+------------------+----------------------------------+----------+|  Owner           |
Relation            |   Type   |+------------------+----------------------------------+----------+| megera           |
access_log                      | table    || megera           | hits                             | view?    || megera
        | junk_qwerty                      | table
|+------------------+----------------------------------+----------+
Table hits now becomes view ? 
Regards,
    Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83