According to Samsung Finland's website (Translated to English)
Samsung Android-range success of the phone Galaxy S is updated Android 2.3. Update arrives in mid-April.The update might be available only in few countries at the beginning.
Soon the successful Android phone will be updated to Android 2.3 (Gingerbread)-version of the software. The update is a welcome gift for the Galaxy S owners. The update is in test phase the late stage, and the new OS version arrives for users to download in mid-April.
Android 2.3 version of the software will be available on Samsung Kies software.
Are you going to wait till the Galaxy S update reaches your country???