About three months ago, Google announced an easy way to integrate AdSense into Blogger. Today, we get word from a DigitalPoint forum thread named Google is storing AdSense information on Blogger servers that Blogger is a bit slow.
Slow in the sense that even though AdSense made use of the new Google Accounts Integration, Blogger won't work with Google Accounts. Ok, so you can not use your Google Account ID to start a blogger account (I did not verify that), but when you plugin your AdSense information into Blogger, it won't work with the new Google Account ID, you have to enter in your old AdSense login information to integrate the two.
I didn't even know you could access your AdSense account from Blogger (although I couldn't log into it). The Blogger servers do seem to be out of sync with AdSense though. I tried logging in and I couldn't, so I tried my AdSense login from 4 or 5 months ago (before it was rolled into Google Accounts) and I was able to authenticate with my old (5 months old) AdSense login/password.
Crazy...Forum discussion at DigitalPoint Forums.