The matter of rice flour substitutes was brought to my attention recently through a message from a fellow GlutenFreeHelp user:

“I have a gluten intolerance and I’m also allergic to rice. 

“What other options do I have that you might know of? I am already using almond flour. The sorghum flour doesn’t really agree with me either. Any suggestions would help me especially when creating baked goods that taste good.”

My reply:

“There are SO many flour “mixtures” and options to replace the rice. You have to keep in mind that the “mixture” will need to balance to make a whole structure to accommodate any particular recipe. The Xanthum gum will need to be altered or even the liquid based on which flours you use.”