It seams like Microsoft have come to reason. With the delay of version 5.1 it would have been a very long wait for the countries in Asia where NAV 5.0 was not planned to be releases.
Release Schedule for Microsoft Dynamics NAV 5.0
All dates given in this document are estimates and subject to change.
This is a wise decision to extend NAV 5.0 to other countries. I only regret that it hasn’t sooner. Many of bugfixes in Portuguese localization are marked in Partnersource that it will include in NAV 5.0, but there hasn’t a NAV 5.0. Now I found out.