Hannu Krosing wrote:

>On P, 2005-04-24 at 04:00 +0300, Hannu Krosing wrote:
>How much change would it be to have an option to not used LISTEN/NOTIFY
>in slony ?
>
>On heavily changing databases with some long-running transactions
>pg_listener can easily grow  to tens of megabytes in size and this can
>become the main bottlenect to slony's performance, as pg_listener is a
>table with no indexes.
>  
>
I have added this in as a feature request ...

http://gborg.postgresql.org/project/slony1/bugs/bugupdate.php?1280

It won't be happening until after 1.1, as it is too invasive for now. 
But it is certainly not forgotten...