I took it with me everywhere for the first year or so. Now I have rebelled. For playing mp3s, I often use... an mp3 player! It is smaller and more convenient than my N800.

It is very unusual for me to encounter wifi that is free in my neighborhood, so I mainly use it in my house. Of course, I take it with me if I'm going on a trip. And wherever I KNOW that I have a use for it. But I'm through taking it with me just in case. Just in case usually doesn't happen.