DPERUGINI  "Google Maps is already the default service used for map lookups in Address Book."

That is true, but the built-in service only provides a link to the Google map ('Map this Address'). 'Google Maps Plugin 2.7.1' also provides the following services:

- Google Directions (which lets you plug in a second address for directions)

- Locate in Google Earth (launches Google Earth version of map)

- Google Preferences (a whole bunch of useful additions, such as displaying phone number on the map listing).

- Google Map for [Address Book Entry] - whatever Preference options you set are available with this option. If you option to use the built-in plain vanilla 'Map This Address' option, it's still there, which is very thoughtful of the Google people.  
(Version 2.7.1)

DPERUGINI   I don't understand why so many of commenters of these FREE applications from Creative.Live.Love are so vehement regarding the simplicity of the applications. The developer, who has an obvious esthetic sense creates some attractive, single-purpose applications and asks nothing in return other than some feedback when something doesn't work.

So rather than flaming the poor developer, how about simply emailing him with a problem that you're having or a feature that you'd like to see introduced.  
(Version 1.2)