Subject: Greetings from Google / congratulations 
Hi again,

  Congratulations!  You might not know it, but your
  gadgets are hugely popular, making you one of our
  top developers.  As a simple thank-you, we created
  a page where you can post a photo, bio, quote and
  most importantly, a link to your website:
    http://google.com/ig/authors

  For more information about the page and how to
  post your information:
    Google homepage API posting

Thanks!

p.s. apologies again, Google corporate policy doesn't
  allow me to disclose the number of users you have,
  but rest assured, it's a lot.