ICANN President and CEO Rod Beckstrom just announced (via Twitter) that he is leaving ICANN. According to his Tweet, Beckstrom intends to leave the organization in July of 2012.
Under Beckstrom, ICANN recently approved the gTLD program, with the applications expected to be considered in the next several months. Beckstrom became President and CEO of ICANN just over two years ago in July, 2009. You can read more about Beckstrom on the ICANN website.
A full press release with the announcement is expected soon.