Here's a wall with cork tiles.

Not sure if it is flooring material specifically, but it seems like it could work.

We had a bathroom with cork walls in a house we lived in a number of years ago. Two architects who lived there before us had designed it, and the cork looked great. But I don't think it was flooring material.

I suggest you look into a line of wallcoverings called Maya Romanoff.
http://mayaromanoff.com/
This wallcovering vendor has very unusual surfaces for walls and ceilings. Not sure about cork specifically, but there are many other options that have a similar look. To answer your direct question, no I've never used cork flooring on a wall. I'm sure there are cork wallcoverings out there. I actually have used cork in a fabric application for a headboard. You could use this same cork yardage to "upholster" the walls. Hope that helps. Charmean Neithart

Here is a wood veneer by Maya Romanoff...

Here's another image of a cork wall. http://www.google.com/imgres?imgurl=http://1.bp.blogspot.com/_bviKFvrGRYk/TRjKyo9PWRI/AAAAAAAAA7I/j02baM6UMY4/s1600/style%2Bestate.jpg&imgrefurl=http://www.kellyinteriordesign.net/2010/12/design-idea-cork-wallcovering.html&h=338&w=450&sz=58&tbnid=zXgpem6-0rJZDM:&tbnh=84&tbnw=112&prev=/search%3Fq%3Dcork%2Bwallcovering%26tbm%3Disch%26tbo%3Du&zoom=1&q=cork+wallcovering&usg=__Gk8_wvFOLx1h4Ze-ICB14oKW1po=&sa=X&ei=VV8cULqPIcqniALKj4Fo&ved=0CCAQ9QEwAw