Adsense now allows us to choose ad font:

Google adsense has announced that it will give the publishers a choice to select a specific font for the ads.It is in it's initial phase allowing us to choose from the following font styles:
1.Verdana
2.Times
3.Arial

To set a font as the default for all AdSense for content units :
Sign in --> My Account --> Ad Display Preference section --> Edit --> Choose font --> Save




If you're creating a new ad unit, you can choose a custom font while generating your ad code. Alternatively, you can update the font for an existing ad unit, by editing that ad unit through the Manage Ads page.