I can't imagine the ipod touch/iphone being any different if not even worse due to lower pixel density.
The great thing that I love about my N810 is how small it is to handle and how perfectly it sits in my hand. On a crowded subway I can easily use it one handed and tucked close to me with my thumb on the pg+pg- rocker, which is more than I can say about the Kindle 2 and probably even the iphone.