Cell phones are swell.  Anyone who has your cell number can call you at the most inconvenient times whenever they feel like it.  It’s great.  In an important meeting, when you’ve just gotten the baby to sleep, when people are waiting behind you line at the supermarket, someone will call you and you can have a nice long conversation about what you said and what he said while everyone else waits for you pay for your groceries, instead of yakking to your friend on the phone.