[sueflauto]

Just to say that I've never had a problem with the sound quality with Skype - rather better quality than the phone in some cases, and they have upgraded the software recently. As pointed out free if the other person has Skype, 1c a minute if you use SkypeOut to phone a normal phone number. I've also got SkypeIn, which is a uk London number (I believe other countries have it) which people can use to call you at the appropriate local UK rate (which on certain packages could be very cheap).

All in all I'd certainly recommend everybody to investigate - for the cost of a headset it must be worthwhile.