The upgrade is coming over the air, Google announced on Twitter, and is rolling out now. You might not see the update immediately, however, as the company notes: “Be patient, may take a few weeks for OTA to complete.”
Google announced just before Christmas that Gingerbread would be coming to the Nexus One, and it was expected to arrive last month. As always, it’s better late than never.
Android 2.3.3 will provide extended support for NFC to the Nexus S, allowing apps to interact with more types of tags in new ways (including the facility to write to tags, not just read them).