Rumors were of an announcement yesterday. I am just about the only person I know who does not own a cellphone: when I am in my home office working I am (and I should be) instantly available to my customers, family, and friends. However when I am out of the house, I would find it an annoyance to even receive messages - that is my time off. If I am wilderness hiking I will occasionally borrow my wife's cellphone in case of an emergency but I keep it switched off.
I think that I will get Apple's combo iPod/cellphone if they do bring it to market. My MP3 player is over 5 years old and only stores about 80 minutes of music. Also, I can leave the cellphone turned off.