I have joined Voxeo's developer program for their Evolution application, a visual design tool for interactive voice response (IVR) systems. Part of the deal is that you get a strange phone number with a +990 country code. There is no country associated with this code and Skype users can call these numbers for free. My Skype account is now being forwarded over Voxeo to a SIP address from Gizmo Project which I manage on Voxalot to make use of it's call connection rules and voice mail.
Have a peek on my settings:
A better explanation can be found at the Voxeo support forum. I wonder what VOIPSA's Dan York would say. In January he started a discussion with his blog post "Skype says "No" to VoIP interoperability - *because customers aren't asking for it!* - Well, I am!". He is, by the way, working for Voxeo and this partly solution for his problem comes from his own company. So I guess he was always aware of this trick.
I am happy now that people can call me with Skype and I don't have to keep me computer running or buy a special Skype phone for this purpose. That's the reason why I nearly never used Skype. I don't like applications which keep me tied to my computer in order to receive messages or phone calls, like Skype or the MagicJack normally do. Let's see which other solutions I can develop with Voxeo. Their visual tool makes the design of VoiceXML fairly easy.