listen/notify argument (old topic revisited)

A while ago, I started a small discussion about passing arguments to a NOTIFY
so that the listening backend could get more information about the event.

There wasn't exactly a consensus from what I understand, but the last thing I
remember is that someone intended to speed up the notification process by
storing the events in shared memory segments (IIRC this was Tom's idea). That
would create a remote possibility of a spurious notification, but the idea is
that the listening application can check the status and determine what
happened.

I looked at the TODO, but I couldn't find anything, nor could I find anything
in the docs.

Is someone still interested in implementing this feature? Are there still
people who disagree with the above implementation strategy?

Regards,
Jeff