flour shortage

There is nothing like the lack of an ingredient to stimulate the creativity in all of us. (Some of us do it all the time! I mean, run out of ingredients.) A flour, oil, shortage or rapid jump in price will also inspire us to look for substitutes. So, here with the ideas for substitution in flavour texture or price!  

All ideas and inspirations welcome!

Rye is disappearing, at least until the next crop is in, so what else can we use? organic grass seeds?  Different Cultures have different substitutes, some of these cross over nicely.