A new service that will let you make local and international phone calls for free from your landline has been launched. PokeTalk lets you make calls of up to 10 minutes long to a variety of destinations across the globe. No need for a headset, microphone or speakers. Found at Computer Shopper - http://www.computershopper.co.uk/news/234945/call-from-your-landline-for-free.html?
link in first post.
After the 10 mins are up, you can redial and continue with you call.
It may save some people money. Shame about the name of the service really - it mislead me at first :)