Skype Free US to US
Techcrunch is reporting that Skype is announcing that calls from Skype to a landline or mobile phone in the U.S. or Canada are now free, through the end of the year. The little limit is that you have to be in the US at the time of the call. Emmm… whatever happened to VoIP being internet based and hence location less. I mean if I use skype it travels over IP lines until it hits the final switch where it goes onto the phone lines. If somebody could explain the reasoning (ex not hurting telcos) to this, then please do.

Take a look at my post to Skype Journal about the five effects of this promotion. I think some of the answers are there.
http://www.skypejournal.com/blog/archives/2006/05/how_free_skypeout_in_north_america_shoul.php
only two reasons,id say
Pentration,Obliteration(of the other telcos,ofcorse u said that)
But i think this would help them get popular and even if half of the users who signed up because of this promotion, swap over to another service next year(that is in case skype stops the free plan), it still would be a far bigger number than the people they have right now,dont you think