Aaaah! NO! Skype is already a piece of social software. Why tie yourself to one system? Do this the right way -- add FOAFnet support from day one, export people's buddylists, and you might just win the whole the online presence thing as well as VoIP.
(and I get to grumble again about how I hate how FOAF handles arbitrary IM/messaging entries -- it should be <foaf:im service="skype">borismann</foaf:im>, dammit!)