I know several of you have gotten this error message, so I wanted to
let you all know that the problem causing this error message is a
known issue and it's being fixed.

You might see this message if:

a) you try to sign up for AdSense at www.google.com/adsense using a
Blogger blog or another website hosted by Google
b) you try to set up a URL channel that includes "blogspot.com" or
another URL hosted by Google

This issue is being worked on, and I'll let you know when it's fixed.
In the meantime, please feel free to sign up for AdSense with your
Blogger blog directly through Blogger by following the instructions
here: http://help.blogger.com/bin/answer.py?hl=en-uk&answer=50288.

Thank you for your patience.

-Jennifer