Not wishing to harp on (honest), but we just launched some very real competition. We've spent the last 2 years polishing our app which allows you to make VOIP c

Not wishing to harp on (honest), but we just launched some very real competition. We've spent the last 2 years polishing our app which allows you to make VOIP calls out to US, UK and Canadian numbers for free. You even get assigned your own phone number so people can call you back, even if they don't have the app. We can also supply a data-only SIM card for $15/month. It's called Upptalk, check it out.