But survey researchers plan to start calling cell phone users manually, making those calls on weekends. They want to develop a plan of reimbursement for respondents' time or lost cell phone minutes and come up with a code of ethics and safety so research calls don't endanger cell phone users involved in activities like driving.

Gee, I wonder how they'll manage that? "Rule No. 1: Don't call anyone while they're driving. Rule No. 2: When someone answers, ask them if they're driving. If they say yes, ask them when would be a more convenient time to call. Rule No. 3: If they agree to talk to you while driving, and you hear a crash, hang up immediately and delete that cell phone number from the records."