mickmel - 5:37 pm on Jun 6, 2007 (gmt 0)

Each marker infowindow could display an adsense ad besides the address and phone number of the plumber.

That's one thing, but this is another. Using your example, all of your plumber icons would be out there and then they'd add few EXTRA icons for related locations.

the question that remains to be answered is how to target an ad on such little infowindow content?

I asked them about this. They said, at least for now, the content of the ads would be based on the text on the PAGE itself, not on the actual map content. They were looking at ways to make it work better, but that's how it's gonna be when it first comes out.