[Cob] Straw's Out. How About Palm Leaves?

[beno]

Thanks, everyone, for the suggestions. I think I'll investigate the 
sugar cane idea but more strongly look into the coconut fiber, as the 
gentleman who built a cob structure in Panama probably had the advantage 
of trying out all the local tropical fibers and settled on coconut. Yes, 
labor intensive, but labor here is really, really cheap ;)
Thanks,
beno