If you are learning about Skype for the first time, then all I have to say is, "good morning Rumpelstiltzkin, did you have a good nap"?
I lived abroad for a number of years (SE Asia and Ireland) and I've been a big fan of Skype for a number of years, so it made sense for me to extend this to my mobile phone.
For those that want to learn more about what you can do with Skype:
For those that want to learn more about Skype 3.0 for Windows Phones:
If you want to download this directly to your phone now: