Not sure why this is anything special. AAISP in the UK sell SIP phone numbers for £1.20 per month (http://www.aaisp.co.uk/telecoms-prices.html), they take about 10 seconds to set up, and I can use them trivially from my Android phone. Surely it's much the same in the US?

What's the point of the "App"?

Too bad i really like the idea but I guess this would be a gift to scammers.

I think BlackBerry is more lenient with this kind of stuff, and I'd love to see this app for the Q10.