not a referral button

Google today added Checkout to the AdSense referral program, in addition of AdSense, AdWords, Firefox and Google Packs. The Inside AdSense Blog explains how the the new referral button works:

  1. You place the Checkout referral button on your site.
  2. Someone clicks on the button, signs up as a buyer with Google Checkout using a valid U.S. credit card, and completes a purchase of at least $10 before shipping and tax through Checkout within 90 days. (The current $10 minimum purchase corresponds to our existing $10 promotion for new buyers, so this amount may change in the future.)
  3. You earn $1.

You can use one of the 9 preset buttons from AdSense, one of them is a text link and the rest are image buttons in different formats. I think you can use your own text for the text link, but I am not really sure though.

UPDATE: Apparently you can’t… [thanks Ionut!]