Kivinar beat me too it
.
Basically that is all you have to do than you XX-PUB blah
XX is normally your country so copy from the pub to the end and that is your publisher ID.
Not right away but I'll eventually one day maybe make the ads under first column taller and more present. I don't expect many members to click; it's mainly for guests who come through SE's who dont' find exactly what they want; why not offer them more selections?