Just got myself set up today with a Skype account and USB internet phone. I am so impressed! So far I've managed to convince my dad to set himself up too, and am also working on my sister who is moving to India next year, then on to Australia following that. Free phone calls to her in India and Oz would be fantastic.
I opted to buy credit too so that for now I can also use it to dial landlines and mobiles, and I can send text messages from it too (to the recipient, it appears as though the text has come from my mobile phone). This also includes voicemail, so if I'm not online then my contacts can leave me a message. Likewise, I've also set up a SkypeIn number, so people that don't have Skype accounts can still call my Skype line from their landlines and mobiles.
I got a Doro 212 phone from Staples – it's all very simple. Just plugs into the USB port. You can use it as a normal phone. I've even just ordered a Chinese takeaway on it. It is a bit sad though that my local Chinese takeaway is one of the first contacts I've added to my account!!!
Now I just need everybody else to get themselves set up!!! This is brilliant.