Skype Journal, which is on my daily must reads pointed me to a new service and software called JaJah that has a slick web site and seems to be going after the audience that Skype and Yahoo Messenger want, those who do a lot of PC-To-PC calling, but also need some PSTN type termination in both directions, and unlike Skype, by like Yahoo, is SIP based and seems to be very well thought out.
Since I'm on the Mac this weekend, it will be a while before I get to say JA to this, but I like what I'm seeing and reading!