I have just gotten the self hosted site w/ godaddy.
I can get to my login http://invisibleillnessweek.com/wp-login.php
But when I attempt to login it takes me to the URL http://invisibleillnessweek.com/wordpress/wp-login.php (note "wordpress folder" which I don't have) and gives me the "page not found" error.
If I attempt to take the wordpress folder out of the URL, and go to http://invisibleillnessweek.com/wp-login.php, obviously I am back where I started.
FYI: I also own invisibleillnessweek.wordpress.com which would be unrelated to invisibleillness.com and hope this is not messing me up. I can move the stuff (I just started it, no posts) but don't want to delete it.