I work as a team leader for Deya, which is the company which delivers Yellow Pages (as well as some other directories) throughout the country. While the work I do is only for a few weeks each year (as the various directories are published for this part of East Anglia), Deya need route checkers all year round (because there are always directories being delivered somewhere in the country).
Route checkers phone people to check that they've received their directories. (i.e. they're making sure that people like me, and the teams who work under me, are doing their jobs properly). All calls are routed via Deya's call system, which is free to the route checkers. (i.e. route checkers don't have to pay for the calls).
Unlike most 'work from home' jobs, it's definitely not a scam, so perhaps it might be worth looking into?
http://www.deya.co.uk/index.aspx?pageref=5130
Chris