Steve Ballmer, the Microsoft CEO, is renowned for his outspoken comments, and his latest outburst, aimed at Google's Android seems to confirm that the software giant definitely won't be joining the Open Handset Alliance any time soon.

During a Tokyo press conference, Ballmer would not be drawn into specifics on his stance on the Android open operating system for next-gen mobile phones, but did offer one soundbite:

"Their efforts are just some words on paper right now, it's hard to do a very clear comparison [with Windows Mobile]", Ballmer stated.

"So we have great momentum, we've brought our Windows Mobile 6.0 software to market, we're driving forward on our future releases and we'll have to see what Google does."

"Right now they have a press release, we have many, many millions of customers, great software, many hardware devices and they're welcome in our world."