Tracking back foreign keys?

[Benjamin Smith <ben(at)charterworks(dot)net>]

In one of my apps, I have an "images manager" that's become unmanageable. I'd 
like to be able to easily track key dependencies. 

Let's say I have a set of tables like this: 

create table Customers  (
id serial unique not null primary key, 
name varchar not null, 
address varchar not null
image integer references images(id) 
); 

create table Vendors ( 
id serial unique not null primary key, 
name varchar not null, 
vendor_account varchar, 
picture integer references images(id) 
); 

create table Images ( 
id serial unique not null, 
filename varchar not null, 
mime varchar not null
); 

I know that in the images table I have lots of cruft, "dead wood", but when I 
delete from images, is there a "nice" way of finding out what dependencies 
there are? 

Something like 

Select pg_table.name from pg_table where pg_field references images.id

? 

How else do I put it? The output I'd like would be something like
images.id / tablename / table.primary key 
11 / Vendors / 14
12 / Customers / 9

Can this be done? 

-Ben 

-- 
"I kept looking around for somebody to solve the problem. 
Then I realized I am somebody" 
   -Anonymous