The global financial crisis and US election created a convenient distraction for Yahoo, and that proposed ad deal with Google seemed to have put an end to those Microsoft acquisition rumours. Now the deal is off, and Microsoft is still insisting it doesn't want to play ball again, the pressure is back on chief executive Jerry Yang. This is "vehemently denied" by Yahoo, says VentureBeat's Matt Marshall, but he has reported an internal Yahoo memo that says Yang is on his way out. Could the collapse of the Google ad deal have been the last straw? The memo said a...