Google has begun pushing a maintenance update for the Google Nexus One and the Google Nexus S. The update (less than 600kb), Android 2.2.2 and Android 2.3.2 respectively, fixes an issue where SMS messages could be sent to the wrong contact. It’s not clear at this point what other bugs and issues the release might address.
There is no word yet on when Google will release the Android 2.3 upgrade for the Google Nexus One.
Source: Phandroid.com