Droid™ will be renamed Milestone™ for the GSM market. Milestone has been officially announced for Germany, Italy, Argentina and Brazil. In Germany it's said to arrive already monday November 9th, and the carrier will be O2:
http://o2online.de
Google Maps™, Google Maps™ Navigation (BETA), Google Latitude™, Google Maps Street View and eCompass are all listed under the specifications for Droid, but unfortunately not listed for Milestone.

The reason is Google Maps™ Navigation is only supported in America so far. So Milestone will use Motorola's own navigation system MOTONAV instead. (At least until Google Maps™ Navigation will be avaiable in more countries anyway).
However Milestone supports multi-touch pinch zoom, and I have read that Droid doesn't support this feature althought the hardware is still multi-touch.
Droid is delivered with a 16MB microSD card while Milestone is only delivered with a 8MB microSD card.
Milestone has up to 350 hrs. standby time while Droid only has up to 270 hrs. standby time (due to the different networks they operate on "GSM vs. CDMA").
Supported networks by Motorola Milestone:
3G
WCDMA/900/2100, GSM 850/900/1800/1900, HSPA, GPRS Class 12, WiFi.
http://motorola.com/milestone
http://motorola.com/droid