Eboy
As SLF suggests if you use MSN or Yahoo then IP addresses become unimportant as it resolves it for you.
Netmeeting is OK if you have IP addresses from both ends, there used to be servers that you could connect through but I remember training a guy how to use his webcam some years back when we had to connect through a third party server and the only person about was a guy who had the webcam pointing in the direction of his naked nether regions... We left PDQ