Wookey has now put those patches in a download area off 
http://www.aleph1.co.uk/yaffs/ I see there are a few patches.

I will add a patchin for YAFFS2 at some stage soon, but if anyone else wants 
to contribute a patchin I won't complain :-). I expect that a YAFFS2 patchin 
will be a few minor tweaks from a YAFFS patchin. I think a patchin is a good 
idea because it allows one keeps the trees separate and is much easier to 
upgrade etc without beating up the kernel tree too much.

Of course, it would be nice to get YAFFS into the main kernel tree too. This 
is something that has been discussed a lot but has not yet happened.

-- CHarles