Starting in June 2009, Betty Crocker introduced four gluten-free baking mixes:  Brownie, Cookie, Devil's Food, and Yellow Cake.  All of these mixes are made in dedicated gluten-free facilities. 

Find more information on their site here:  http://www.bettycrocker.com/products/gluten-free/gluten-free.htm
 
 

Two customer service reps at McCormick have confimed that none of their products contain nuts.  This includes their "pure almond extract" which lists "oil of bitter almond" as an ingredient.  They explained that this is actually derived from apricot or peach pits, and while it has a strong almond flavor, its source is a fruit rather than a nut.