Stopped using Skype as during low periods of use your PC and broadband connection get used as a supernode, so CPU spikes to 100% and your broadband connection fills up. Not good if you're on a quota, and you can't stop the client acting as a supernode....
Some universities and corporates have started to ban it's use because of the effect it can have.
I've switched to VoipBusters (
www.voipbusters.com) , which you can dial out any landline number from as well as the same features as Skype.