Important update regarding quinoa from the CRC Chicago for 2012 which limits from where quinoa should be used on Pesach.
Per the Star-K and CRC-Chicago it is not Kitniyos
March 22, 2011
The cRc approves the use of whole grain quinoa for Pesach on the following conditions:
•The quinoa is imported exclusively from Bolivia. Ancient Harvest is one of the brands that only imports quinoa from Bolivia; there may be others. The label should state the country of origin.
•The quinoa must be carefully inspected by hand before Pesach.
This is done by spreading one layer of quinoa at a time on a board or plate and checked to be sure that there are no other grains or foreign matter mixed in with the quinoa.This does not apply to Quinoa flour which is not permitted on Passover.
http://www.crcweb.org/alerts.php
Kosher for Passover Status: Quinoa was determined to be Kosher L'Pesach. It is not related to the chameishes minei dagan-five types of grain products, nor to millet or rice. Quinoa is a member of the "goose foot" family, which includes sugar beets and beet root. The Star-K tested quinoa to see if it would rise. The result was as Chazal termed, sirchon; the quinoa decayed - it did not rise. However, recent investigations have found that there is a possibility that Quinoa grows in proximity to certain grains and processed in facilities that compromise Quinoa kosher for Passover status. Therefore, Quinoa should only be accepted with reliable Kosher for Passover supervision.