Its a great device, but they really are two different user experiences. I had an iPhone for a little bit and I thought it was ok and the UI was so simple a monkey could use it, but the N810 was just far better suited to the tasks of being a laptop replacement and my n75 at the time was a better phone.
I could probably find use for an ipod touch as a gaming and music player.
lol. Nah, don't feel like you're cheating. Each has their own uses just like harpgliss said. Heck, I've got two nits (yes, two), and two other mp3 players (both sandisk) and each has a different use. So don't feel all that bad. It's really a good thing surprisingly enough.