With American Apple pundit Walt Mossberg chiming in on the 3G iPhone rumours saying such a version will arrive in 60 days, this story is only going to get bigger between now and June.

And, now feeding the rumour fires in the blogosphere, is the emergence of a supposed spy shot of the 3G version of the device.

Leaked online by iPodObserver, the new iPhone "will also sport a glossy black back, replacing the satin nickel look found on the current model".

According to the site's unnamed sources: "the redesigned iPhone back also drops the black plastic end piece that covers the antenna, and it appears that Apple will continue to offer an 8GB model".

While some speculate that the change of cover makes sense for what Apple are planning to put inside - such as the 3G chip and 802.11n Wi-Fi - others are crying "Photoshop" very loudly, so, as always with Apple-related rumours, big pinch of salt required.