All this cellphone euphoria is getting to me. Have you ever used a cellphone for an extended period of time? They suck. You drop calls, people can't hear you, you can't hear them. They suck. Suck, suck, suck. And I say that as someone who has had one since 1988 and puts about 500 minutes/month on mine. I've had 7 phones in that time, and they all just suck.
Give me a land-line any day.
One thing that has helped quite a bit for telemarketing is to get Caller-ID-blocked-rejection service: if they don't give up their Caller-ID, they don't get through. Your privacy-freak friends will take a while to get used to dialing the per-call-unblock each time they call you, but eventually you'll get quite a bit fewer phone calls.
/jordan