I am still working, and I live on the road. Back home, my wife is also on the road a lot. We both have had cell phones for years as do the kids. We have a Verizon family plan and I have a special plan that gives me no roaming charges and a flat rate all over North America. (I stared out with AT&T, who had the first no-roaming, flat rate North American plan. We dropped it when we moved and found that their local coverage was crap.) We couldn't live without cell phones. We used to have arguments because we couldn't get hold of each other or the kids when we needed to. All of us except the daughter have stone-age basic phones.
I get very few business calls on the cell. Possibly the out-of-country area code puts people off. Almost all my business is transacted on the office phone or via e-mail. Understand that I am a simple contractor and go from project to project. I am not a big wheel.
My cell usage is usually communication with family, my agents, officialdom and friends, who are all over the world. Networking is lifeblood to me.
I have a local phone in my apartment with my fax and answering phone on it and DSL. I buy phone cards at the 7-11 that suit me fine (3.9 cents Canadian a minute to the places I want to call). I use the cell only if I can't use a phone card.
I have Yahoo e-mail accounts for personal and professional purposes that I can use anywhere in the world.
I have been interested in PDAs that include a cell phone function but I have not seen one yet that works well, does what I need and is reliable.
I only need a little technology, and it must be reliable. I also need alternate ways to communicate, for back-up in case one or another method can't be used.