I'm lucky I set up call forwarding to my google number a while ago. I can't even receive calls anymore! If the skype gods are smiling, one of my associated phones will randomly ring if somebody tries to contact me on skype (Google voice I think tries to ring all your phones in hopes that you'll pick up one of them, but in practice it can be somewhat random what actually connects).

Sometimes it doesn't though, and then I have no idea you tried to contact me, because skype is so broken that it /never/ rings when you call me.

This makes matters worse when my skype number is listed as the contact number on some contracts I've signed (their computer system was set up to only accept Japanese phone numbers).