We've got great coverage for voice in countries all over the world: http://www.twilio.com/pricing/international-calling-rates You can both call to those countries and receive calls from them. We also just recently added local numbers in the UK in beta (http://www.twilio.com/uk-voice), which is just touching on the surface of what will be coming outside the US.
You've got my email now so we can get international calling enabled for your account if you'd like. Just reply in our other thread and let me know.