The Motorola Droid will be upgraded to the Google Android 2.1 software this week, the company announced on its official Facebook page. The over-the-air software update will bring the Droid software on the par with the Google Nexus One, albeit with some features missing. "We're happy to relay the 2.1 upgrade to Droid will start to roll out this week, and we will have more information to share on other device upgrades later," Motorola teased on its Facebook page -- without mentioning which features the Droid will get, or which other of its devices will be upgraded. Despite few details on features, Engadget quotes "trusted sources" saying the 2.1 software update for the Droid will bring multitouch capabilities to the built-in browser and for Google Maps 3.4, Google Googles visual search , and the news and weather widgets as seen on the Nexus One . Yet the similarities with the Nexus One end here. Some visual aspects introduced with An...