DOC2000 partitiioning question

[Brendan J Simon]

I've got a single DOC2000 in PowerPC embedded system.  I want to have 3 
seperate partiton, one which is read-only and the other two read-write. 
 I've been told that this is easy to do from the filesystem level but 
the underlying NFTL stuff can still swap bits a pieces underneath the 
read-only partition.  I think what I'm after is the ability to create 3 
"virtual disk devices" with single partions on each, as apposed to 1 
disk device with 3 partions.

Is this doable ?
Is it reliable ?
Where can I find information on this (Howtos, etc).

What are the most suitable filesystems to place on  DOC for reliability 
(ext2, ext3, JFFS, JFFS2 ...) ?
Is a journalling file system suitable for a device such as a DOC ?
Are flash file systems suitable for a DOC or are they desinged for 
ordinary flash chips ?

Is there a way to search the linux-mtd archives ?
I couldn't find anything on the web site (except browsing).

Thanks for any help or pointers,
Brendan Simon.