From the Wikimedia Foundation Governance Wiki

Brin Wojcicki Foundation Announces $500,000 Grant to Wikimedia
The Brin Wojcicki Foundation has also funded such organizations as the Michael J. Fox Foundation. Read more (18 Nov 2011)

Wikipedia’s Contributors and Authors at the Center of Wikimedia’s Eighth Annual Fundraiser
The annual fundraiser brings in critical revenue so that Wikipedia and its sister projects can remain freely available to people around the world. Funds raised in this campaign by Wikimedia and its regional chapters will be used to maintain Wikimedia’s server infrastructure and improve software, expand global reach, and provide direct support to a global volunteer community. The Foundation's total 2011-12 planned spending is $28.3 million USD. Read more (16 Nov 2011)