There's one I keep seeing in Switzerland. The logo is blue. Forget the name. Are you sure these providers can do what you want? I mean you're practically asking for a SIM that has a US & Swiss (maybe UK) number where you can travel anywhere in the world and never nothing/not pay very much.

That's asking a bit much isn't it in a world that nothing is for free?

If I am in a country for a considerable time, I normally purchase a local SIM card. To dial-out abroad I use Skype To-Go. As I work I don't really care too much about the odd charge here or there so I set up call forwarding from my Swisscom contract SIM to this pre-pay new SIM abroad (cost is slightly cheaper than roaming so it seems).