I just ate a bunch of Wash. cherries and got horrible foot/toe cramps. Is there a relationship?

Too many cherries might give you the belly ache but cramps in your feet are unlikely. Cramps sounds more like a hydration or electrolyte imbalance. If you've been out in the heat that makes it even more likely. Check this out:

http://www.yogawiz.com/blog/home-remedies/foot-legs-cramps-how-restore-electrolyte-imbalance-body.html