Feb2010 Debian HOWTO
From PlugWiki
Took me few days to understand that both UBIFS and JFFS2 are working on raw flash devices and not on SD Cards / USB Flash Drives. So the dispute which file system to use is relevant for NAND flash on the Plug itself only. Finally I have installed Debian on 250GB HDD using excellent summary at http://www.cyrius.com/debian/kirkwood/sheevaplug/install.html which has all necessary information.
Therefore this page is of no use, except for a clarity there is no sense in trying to install wear levelling file system on a device that has its own controller that does wear levelling already :)