Looking around after the findings of the Calendar I find this URL:

https://www.google.com/accounts/ServiceLogin?service=blogger

It shows a generic Google Accounts log in page. With "blogger" above the log in box. Logging in doesn't work but the page does exist.

For those who are interested you cant have anything tagged on the URL.

https://www.google.com/accounts/ServiceLogin?service=NOTHING

Is invalid.

Instead of the usual Invalid Request, I get
"Username and password do not match. (You provided trex005)"
when I try to log in.... maybe nothing noteworthy, but I mentioned it anyway