The new Google Maps mashups are coming now by the day . . . Here's PremierGuide's (local search platform provider) customer list plotted on a Google Map. Here's a site — ApartmentRatings.com — that has integrated Google Maps and apartment ratings/reviews from locals.
Unresolved issue: Will Google eventually charge publishers that are in one way or another making money directly or indirectly off maps or integration of maps into their local products?