I use one of these http://www.actiontec.com/products/co..._usb/index.php
Best thing i ever bought - fully integrates skype into your existing home phone.
sits in between your landline socket, your pc and your phone or cordless base station.
you can call out via landline or skype or skype out.
any incomming skype calls ring your normal landline phone as would a normal call.
easy to set up and when you combine it with a cordless dect phone that has a built in speaker phone as well then you have the ideal setup
also your normal home answerphone will also answer incomming skype calls when your not in.