What to do with drift wood?

I see where the Japanese are using the sawdust from driftwood for growing mushrooms.

http://sciencelinks.jp/j-east/articl...03A0637292.php

here is a horse sculpture made with driftwood.

http://en.wikipedia.org/wiki/File:Equus_eden.jpg

Now see that is what I've got on my mind. How would a person go about turning a handy supply of driftwood into sawdust? Would I run them through a chipper shreddar? Would that be fine enough to grow mushrooms on?

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r.h. in oklahoma

Raised a country boy, and will die a country boy.