Tablespaces for temporary objects

Hi,       I've decided to start hacking on PostgreSQL, and I've looked at the 
easier jobs in the TODO list. I'm interested in implementing:

% Add a GUC variable to control the tablespace for temporary objects and sort 
files. It could start with a random tablespace from a supplied list and cycle 
through the list.
       I wanted to know if there are any comments on how I should implement 
this. I've already started and temporary tables already honour 
the 'temp_tablespaces' GUC variable I created. However, I'm not very happy 
with the name, and probably someone will have other comments on this.
       Thanks.