One thing I missed with the Skype Kazaa announcement was the Weblog angle. Tied in with VoIP it’s a very powerful motivation. Add in the Skype conferencing capability and you have a very interesting threat to traditional conferencing because of the file sharing aspect. This is dead on threat to the space Microsoft is hoping to own with their Live Conferencing product and why the bought Placeware last year.
If the motivation is to be another Yahoo or eBay, which Skype could easily form the centerpiece of, this move may be a tell tale sign.