GoogleVideo has it online:
DVDTalk describes it as "epic adventure that can grab the attention of every age group." StompTokyo says,
Nausicaa of the Valley of the Wind was Hayao Miyazaki's first chance to direct a film featuring his own characters, and he used that chance to fashion a fantasy world so complex and believable that it could be compared easily to the worlds of J.R.R. Tolkien and George Lucas.
11/25/2009: FilmStudiesForFree has links to resources on Hayao Miyazaki.