Just a quick update on my previous post. Google Singapore confirmed today (via email) that Nexus One owners in Singapore will get the latest software upgrade.
From Google,
In order to access the update, Nexus One users will receive a message on their phone’s notification bar. They can simply download the update, wait for it to install, and they should be all set. This update will be rolled out gradually to phones – and most users might not receive the notification until the end of this week.