I've participated on Zona Gráfica volume 1, which was presented on the Beja's International Comic Book Festival.
It's a very short story, 2 page only, made with brush and ink, on a A3 paper.
I did the washes directly on the inks. :)
I made it like it was a comercial, about how good a drawing every day does to you, :P
Here are some detail shots, of the book and the drawings.
Here's the link to ZonaBd blog, zonabd.blogspot.com/
And to some photos of the book, http://zonabd.blogspot.com/2010/05/zona-grafica-volume-1.html
All the best,