If you have a Skype account, visit your account page and claim your free 10 SkypeOut Minutes.

At Skype, we don’t believe you should have to pay for calls. That’s why Skype-to-Skype calls will always be free. But even we have to charge a little bit for SkypeOut calls (our service for calling landlines and mobile phones). That’s where SkypeOut Gift Days come in.

On SkypeOut Gift Days you’ll be able to redeem 10 minutes of credit for SkypeOut calls and it won’t cost you a thing. It’s free.

I am not sure if this is only available to existing accounts or not.