The title is not an April joke – Apple released a letter announcing that Steve Jobs resigned as CEO of Apple. Jobs stated that they always knew that there will be a moment of separation from the leading position, as can’t fulfill its obligations and that day has come. “I would like to continue to serve if the board of directors decides that I – as chairman, director or regular employee of Apple.” – Jobs wrote. The letter recommended Tim Cook for a new CEO.
So far this is all information available, but most likely the sudden decision is related to the health of Steve Jobs, who this year is on leave for medical reasons.