New AdSense Ad Format

Today when I logged into my AdSense account, I found this message saying that an additional format for your text, image, and video ad units has been added.

but when I clicked ‘Learn more’ it showed an error page that says

We’re sorry, but the information you’ve requested cannot be found. Please try searching or browsing the for answers to your AdSense questions.

I checked the available but could not find any new ones.

Has anyone seen the new AdSense Ad Format?

Update: Darren just let me know that Google has added a new 200×200 Ad Unit.

Google AdSense has just added a brand new 200×200 “Small Square” ad unit size to their regular ad unit line up. So new, in fact, that AdSense hasn’t announced it yet, and it hasn’t yet made it into their yet.

via JenSense