Reinstalling OS X
Thanks to everyone who weighed in with the suggestions on how to fix my OS X login issue.
I learned a lot about OS X today and had some fun hacking around in single user mode.
But after I tried all that, and nothing worked, I figured the only way out of the mess was a reinstall which I am in the midst of.
Andrew asked why I posted this question on my blog instead of a forum designed for this kind of question. Well first, I figured there were a lot of readers who knew the answer. And I was right. There are some super smart people who read this blog. And second, by posting on my blog, I was able to post a couple screen shots of the problem that made it easier for me to articulate the issue.