Long Expiry US card with Roaming needed

[RTuesday]

Originally Posted by PhotoJim

Another option is to try to get a Google Voice number. ... Voice calls can be forwarded to your Australian number when in Oz, and your US prepaid when in the US.

Google Voice doesn't yet forward to numbers outside the US (and Canada?), so a US number (such as ipkall.com) that connects elsewhere or forwards is still needed, at present.