Americanization is the process of editing out offensive material in Anime and Manga from Japan, who's population isn't as uptight as the Protestants we have here, in the US. This often does NOT improve the quality of the anime. Cool action scenes (violence), descriptive language (expletives), intimate moments (nudity), and shounen/shoujo-ai (homosexuality) is often affected.
Americanization? You mean the castration, neutering, spaying, and female-circumcision process being used by VIZ Entertainment?