While Pat feels outrage over Skype's action, I feel mere disappointment. Corporate attorneys write this sort of letter all the time under the name of copyright protection. In the past I have been told the corporations need to send such letters even when they do not intend to enforce a cease and desist or they can lost their copyrights.
My disappointment comes that Skype has now reached the height and weight where they find it necessary to act like any other major corporate entity.
Jan lost a good share of my sympathy by choosing Voip-watch.com for his new blog name. This is way-too-close to Andy Abramson's highly regarded Voip watch. Unlike Skpe, I doubt Andy will threaten litigation. but if you ask me, he has every reason to be very pissed off and I think the less of Jan for this latter decision.