"Taarna: a History" at Women in the Alt--Essays on Women in Sci-Fi and Fantasy.
A French site about Taarna. It consists of an extensive description of how the sequence was made. Great site if you can read French.
A thoughtful review at Angelfire.com. It includes a critique of the sequel to Heavy Metal, which I have not seen.
A review of Heavy Metal at FeoAmante's Horror Homepage.
Harzack. Another French website. Written and illustrated by Moebius, some of the visual concepts from this story, which appeared in the 1977 editions of Heavy Metal magazine, formed the basis for the Taarna sequence, notably the vast, barren vistas and men riding on bird-like creatures. "Metal Hurlant was founded in 1974 by renowned French artist Moebius, . . . whose imagery forms the basis of most of the 'Heavy Metal' movie--i.e.: the popular Taarna and Harry Canyon segments." J. Lofficier, "Giving Credit to Mogel," Los Angeles Times, 16 March 1996, Sec. F, p.16.
Chris Achilleos' Web Site. Accomplished British fantasy artist whose epic painting of Taarna was used for the movie's promotional poster. His web site includes some fascinating concept drawings of Taarna, in addition to his famous painting. Achilleos' painting "captures the spectacle and adventure of the final 'Taarna' sequence." Carl Macek, The Art of Heavy Metal: Animation for the Eighties (New York: New York Zoetrope, 1981), p.95. There is also a brief biographical sketch of Chris Achilleos.
Taarna's costume modeled by "Veronika." Proves the thing actually can be worn. Not sure about the wig...