The latest example of Facebook’s strategic partnership with Microsoft arrived today, along with the company’s new Places location service. Maps from Bing will now be featured as the default maps when in all Places interfaces. This means the web site, mobile web site and in mobile apps including the iPhone one.

Google Maps, the third-party mapping service that many other tech companies choose to use, is obviously not appearing.

[Update: While the Microsoft blog post about this says that the iPhone app is using Bing, the iPhone app is currently using Google Maps.]

Here’s how you’ll be seeing the maps in the interface, in the words of the Bing Community Blog:

Select the Places button, find the location where you are and check-in. Just like that, the check-in will flow to your profile on Facebook.com complete with a Bing Map, a pin of your location and any commentary you’ve added to your check-in. Places also includes the ability to see where your friends have checked in, a link to get directions to a place (via Bing Maps) and a Like button for the respective place page. The place information bubbles up to the actual Places page which has a larger map experience, plus an update for you to see all of your friends who’ve visited that location.