I have used Skype with a Mac G4 and a G5 both running OS X 10.3.6. I have called to several states, including Hawaii, and have made calls to Asian locations. My wife uses it daily with a headset. I use it by just plugging in a pair of old high-quality headphones to the microphone input, and listening over my audio system connected to the audio output of the Mac. The sound quality is really excellent. The people I have called say that the sound quality that they receive is very good, very clear. I have tried to use Skype to Skype, but have not yet found anyone available. Skype is definitely worth having. George Harvey On 12/24/04, invicta wrote: > Has anybody had any experience with Skype and using both versions ?