Forum OpenACS Development: Response to How can i display "formatted_price" with a comma between every three digits?

Yeah, util_commify_number will do the trick, but if you're getting the number from an Oracle query, you probably want to use Oracle's to_char function. E.g.:
SQL> select
  to_char(123456, '999,990.00')  as number_pretty
from dual;

I dunno about with Postgres.