For those who skeptical about Linux phone. Android platform also using Linux,

The additional thing is added another platform on top which is quite similar to Java J2ME but custom made by the Android team under Google.

There is a story behind this on why Google doesn't just use J2ME. Those who curios can search the web for further info.

The big question about Android is whether it will be very open as expected of any other Linux platform.

The hype about Android is because geeks want open platform that they can easily develop & customize.