I originally posted the installation issue (error upon installing & only ever get the error-ridden successful install screen) here
http://wordpress.org/support/topic/230856?replies=3#post-944841
Moderator samboll suggested following the steps on this page, which I did:
http://codex.wordpress.org/User:MichaelH/Installation_Notes/Yahoo
and I still have the same problem.
I followed the steps 1-5 at that link, and then went back to the Yahoo interface and clicked on View Your Blog which took me to the install page, where I entered a blog name and email address and hit Install WordPress. I still get a page full of errors.
In my phpMyAdmin screen I have 3 databases:
blog (23)
mysql (6)
wordpress(0)