Is there an inkwasher in the house?

I just got this question as part of a very nice email:

A request for you -- have you considered doing an entry on ink washes? I've started experimenting with them lately, and it's not as intuitive as I would have thought. Is it better to lay a darker wash over a lighter wash or vice versa? How does watered down ink work versus watercolor? How does one get the pseudo-ink wash effect of someone like Toby Cypress? Etc, etc.

I know absolutely nothing about inkwashing. At all. I think I MAY have done it, ONCE, when I was ten. I'd ask an artist I know personally, but I don't know any who do inkwashes.

So I now call upon all the readers of comic tools: Can anybody help this man?