The internet told you to stop putting Jimmy Wales' face on the donation banners so now you show us the alternatives. Ok, point taken. I made a small donation, please bring Jimmy back! :)
That said, here's the donation link in case you've missed it https://wikimediafoundation.org/wiki/Donate
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The fundraiser has ended, 20$ million target reached http://venturebeat.com/2012/01/02/wikipedia-20-million/
The $20 million generated by the 2011 fundraising campaign will be used by the foundation to purchase and install new Wikipedia servers and other hardware. It will also be used to develop new site features, expand Wikipedia’s mobile services, add to the foundation’s legal defense fund and support Wikipedia’s large and worldwide community of volunteers.
The foundation’s total budgeted spending for the 2011-2012 year is $28.3 million. While most of that sum was raised through the on-site Wikipedia fundraising banners, the rest will come in the form of grants from institutions and smaller donations from individuals throughout the year.