I read your article; cool setup. When phone routing is a technology that can be used by mere mortals, the sky is the limit!

– Arik

I didn’t quite understand – do you want this setup for your own business or to set up a calling card business?

Either case, I’m the sole user of my setup. The virtual machine mentioned runs ONLY asterisk, and for me it’s enough, even with protocol re-encoding. I don’t have the sizing experience to tell you about your setup – I suggest you test it out and decide.

My VPS provider is VPSLink at http://vpslink.com – I don’t get money from them to say that I found their service reliable and convenient to use. I use their cheapest deal. That’s all I can say – I never tested their stronger machines or dedicated server. Shop around, they’re not the only game in town.

– Arik

On a similar note (but not as sophisticated as what you’ve done with Asterisk), I recently realized how easy it would be to roll your own VoIP home phone service (I had no idea all the pieces were so readily available). Now I’m using it instead of Vonage. I wrote up the details here:
http://voipenthusiast.wordpress.com/2008/06/14/how-to-build-your-own-voip-phone-service-for-5month/

Regards