LISTEN/NOTIFY improvements?

I am a programmer who works on a couple of products that use PostgreSQL 
as their backend (http://www.nopali.com, http://www.iwanttops.com).  
Both my clients need to receive notifications when rows in the database 
change.  Thus far, we've been rolling our own because LISTEN/NOTIFY 
doesn't do what we need.

What we need is on the TODO list:
- Add optional textual message to NOTIFY: This would allow an 
informational message to be added to the notify message, perhaps 
indicating the row modified or other custom information.

I want to help get this done for 8.1, but lack the deep understanding 
necessary.  Is there someone on this list that I can beg/bribe to make 
this happen?  I would be delighted to do stress-testing and 
benchmarking on the resulting code.

(Incidentally, there are two related TODO items you might want to take 
care of while you are in there:
- Allow NOTIFY in rules involving conditionals
- Allow LISTEN/NOTIFY to store info in memory rather than tables?   
Currently LISTEN/NOTIFY information is stored in pg_listener. Storing 
such information in memory would improve performance.)

Regardless, thank you for all the great work that you have been doing;  
PostgreSQL has made my life a better place.

Sincerely,
Aaron Hillegass
Big Nerd Ranch, Inc.
404-210-5663