Microsoft sues Motorola over Android

Surprised nobody has mentioned this so far.

Microsoft sues Motorola over Android

No doubt the first of many such battles - if Microsoft win this fight they'll be after the other Android makers next (though not HTC who already pay Microsoft, effectively for the right to use Android, and probably not Samsung or LG either who will both be supporting WP7).
Chances are that Motorola may be forced to do the same as HTC and pay Microsoft for Android.

Supporting Android is getting more expensive with each legal battle and hidden payments to IP holders.
Android vendors with no software IP are just pawns in a game between IP holders - rather than go after Google it's the licensee device vendors that are most often the accused, and exposed.