Hi Larry, I feel the primary advantage of MSN is that it includes the 'built-in' webcam feature while Skype requires the 3rd party Spontania 'plug-in': http://www.video4skype.com/

Though both Skype & MSN 7 provide impressive voice conversation connection & webcam transmission, I personally tend to use Skype for dedicated voice only conversations as the sound quality appears (to me) to have a 'slight' edge over MSN's.

Scott