I'm just nuts about Skype! I've tried many other internet phone type applications over the years, but none of them worked very well and certainly not on slower internet connections.
My family is spread out all over the world (UK, South Africa, US & Australia) and phone calls can cost a small fortune. As a result, we don't tend to talk too often, keeping in touch mostly by email (I still have to educate my brother about the what the reply button does in outlook though!). A few days ago, I finally got my dad on skype (he was sceptical, still using dialup) and we spoke for an hour, probably the longest conversation in years!
Never mind the technical achievements of skype (amazing quality & performance, even when using dialup connections), the social impact will be enormous. People might actually start talking to each other again, instead of email.. I know I plan to.
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