The first season of the Black and White series along with the first Black and White movie/s (the woeful Victini one/s, unfortunately) will be available for all regions supported by Netflix, whilst the very first season, featuring the Indigo League, will be available for those in the US, Canada, the UK and Ireland.
This follows the deal with Hulu in America to stream an even greater selection of the anime and movies, and demonstrates a growing understanding of the value of these on-demand streaming services by The Pokemon Company International. Hopefully, since those of us outside of the US can't benefit from the Hulu deal, it will just mark the beginning of what's available on Netflix.