The iPhone 3GS was announced on June 8, 2009, and has improved performance, a camera with higher resolution and video capability, and voice control.[23] It was released in the U.S., Canada and six European countries on June 19, 2009,[3] in Australia and Japan on June 26,[24] and saw international release in July and August, 2009.
I expect a worldwide release of the iSlate | iPad or whatever they call it.
Whilst it has a rumored sim slot - i'm sure its wwan will be network free and therefore will not require contracts to be in place with mobile providers.
That was the main reason for the original iPhones staggered release.