It is worth noting that the "Taiga" referred to in the OP, which was in versions 1.2 to 1.6.4, is now what is called "Snowy Taiga" (or "Cold Taiga" between 1.7 and 1.12. Oddly enough, instead of adding a new snowless variant they made the original biome ID have no snow in 1.7 so this is important to remember if you want to upgrade older worlds as it will now rain instead).
Why not AMIDST? It is many orders of magnitude faster than having to actually generate a world - just click on "random seed" and a new map pops up within seconds (for best results use 1.12.2 as Mojang's terrible code made 1.13+ MUCH slower (hopefully they improved things by the full release but I've heard it is still much slower); aside from new ocean biomes and a few new minor biomes like Bamboo Forest the biome map has been the same since 1.7).
Also, be aware that this thread was created in 2012 and the OP hasn't been active since 2014 (it was necroed by somebody who tried using the seed in a modern version just to say it sort of works, then I replied saying that even the definition of a "taiga" biome was different when this thread was made).