Buckwheat flour. Can it be used for pizza dough, and what other uses/properties does it have?
You can use buckwheat for pizza dough, but it will not be anything like an actual wheat flour. Buckwheat isn't actually a grain and doesn't contain gluten. The gluten is what gives pizza dough it's chewy texture (and makes it stretchable when you're tossing the pie).  

You need to substitute something like xanthum gum to make up for it.  If you want to go down this path, google 'gluten free baking' for advice and directions. 

On the other hand, buckwheat makes an excellent partial flour substitute in pancakes.