Yippee! I love skype. Voice quality is very good compared to others. As explained in this FT article, now they are upping ther ante and making it free to call landlines from your PC (skypeOut) *FREE* until the end of the year! Competition is good!
I've downloaded the latest Skype 2 and made calls to regular home and cell phones without any issues. I've also tried the Skype 2.5 beta (18.104.22.168), which has additional features that makes calling even easier. On the left, you can see the "import contacts from Outlook" screen. Instead of importing them, you can also just "view" them.