Free VoIP calls to landline phones..

Thanks to Kaps, I came across this new service from VoIP Stunt where one can make free calls to landline phones in many countries using skype like interface for free. It sounds too good to be true. I checked out the quality and I was able to manage some decent conversations. Not sure how long this will hold its free ground.. Hey, What the heck, make hay while the sun shines.. I am hoping that this would stir some interesting offers from its rivals Skype and Gizmo project. I could see a new era of free VoIP calls to landlines dawning in the horizon.