Hi
I decided to donate advertising space to various charities and open-source projects, and I recently contacted www.adcouncil.org about running public service advertisements on my website, http://www.wikinerds.org . So, I thought whether you would be interested to donate advertising space for their ads (or of any other similar agency - do you know any?) in Wikipedia. AdCouncil's campaigns include ads about the tsunami, smoking, education, discrimination, etc. Have you discussed about this possibility? I think it would benefit many people.
Some campaigns you may be interested in:
http://www.adcouncil.org/campaigns http://www.nosoftwarepatents.com http://www.eff.org/br http://thankpoland.info/
I know in the past you were negative towards software patent banners, or even Firefox buttons, but I think you should reconsider. I am sure the majority of Wikipedians would support these campaigns.
By running public service ads you can remain totally non-commercial and help your readers get informed about various issues.
In addition, I am accepting banners and image buttons for linking to your own project, if you have started anything interesting about science or open-source software. So, if any Wikipedian wants to be linked from my site, just send me your site address and 88x31 button and I will consider it. Of course, Wikipedians who would like to promote science and the nerd community can link back to my site if they want using images from http://portal.wikinerds.org/banners