I've used both Palm T3 and Nokia 770 as ebook readers, and I'd have to say that FBReader on the 770 running OS2008HE is extremely good. I've put a few notes about how I use Plucker on these devices at
http://hindesite.wordpress.com/artic...book-workflow/
My partner has an ipod Touch but I think I'd prefer my 770 for reading. Hardware buttons and a larger screen are quite important to me.