Originally posted by FireIce:
[b]Skype (IPA pronunciation: /skaɪp/, rhymes with type) is
a proprietary peer-to-peer Internet telephony (VoIP) network,
founded by Niklas Zennström and Janus Friis, the creators of KaZaA
and competing against established open VoIP protocols like SIP,
IAX, or H.323. The Skype Group is headquartered in Luxembourg with
offices also in London and Tallinn. The system has a reputation for
working across different types of network connections (including
firewalls and NAT) because voice packets are routed by the combined
users of the free desktop software application. Skype users can
speak to other Skype users for free. Skype also has paid services
allowing users to call traditional telephone numbers (SkypeOut),
receive calls from traditional phones (SkypeIn), and receive
voicemail messages.
In September 2005, in a deal generally criticised by many as
overpriced, eBay acquired the company for $US 2.6 billion in cash
and stock, plus an additional 1.5 billion in rewards if goals are
met by 2008.
for more info, pls refer to wiki
Official Skype
Website[/b]
hmm...p2p..lucky it isn illegal 