You can now choose to customize the appearance of your Google Adsense ad unit by choosing between “Arial”, “Verdana” or “Times” font-faces on all English (Latin-based) web pages.
To quickly change the font settings for every ad unit generated from your account, visit the Ad Display Preference section of your Account Settings page to select a new account-wide font face.
To select custom fonts for individual ad units, go to Manage Ads and select the individual ad unit to make the changes.
This could be a boon for all publishers who have been struggling with Ad blindness, as the new fonts will make the Adsense ad unit look different.