http://source.android.com/roadmap
through: http://tweakers.net/nieuws/56421/google-werkt-aan-nederlandstalige-versie-android.html

   * Q4 2008: German
   * Q1 2009: French, Italian, es_es, zh_TW, Ja, NL, CZ
   * Q4 "This feature will enable support for input methods other than physical keyboards, for example soft keyboards."

I consider this to be an early hint on which markets the G1 might hit next.