[acg]

Reading between the lines this is about attacking the growth of android. It isn't in Apple's or Microsoft's interest to have Google Android steal their market from under them. Android remember uses the Linux kernel, and potentially is not the only mobile O/S that will be Linux based. Linux has a good track record in the embedded space.

Or put another way, if Google is going to rule the mobile: they would both like a piece of the action.

Whether or not it is true is a different matter, but it's plausible.

[Auzy]

Yes, but clearly Microsoft is well aware that doing so would put a huge dent in their image, which would cause them to lose sales (not gain profit).

Apple only sues everyone because they can get away with it. They have brainwashed enough of the population to believe that everything they do is innovation, so people think that its fair nuff that they sue everyone.