I discovered the solution to the WordPress registration problem. You will now receive an email with your chosen user name and password when you subscribe to this site. The problem is with the last WordPress upgrade (2.3.1). With some hosts (including Bluehost, my host), this upgrade broke the auto-generated email. I don’t know why, but it did.
Here’s the solution if your interested: What you need to do is open up pluggable.php (which is located in the wp-includes folder in your WordPress installation on your host server). Look for line 228 and comment it out (to comment out a line on a PHP file, use //). It will look like this:
// $phpmailer->Sender = apply_filters( 'wp_mail_from', $from_email );"
Then save the file and you’re good to go. The only thing I don’t like about this solution is the email format. Instead of receiving an email from ‘firstname.lastname@example.org,’ you will now receive an email from ‘email@example.com.’ What an ugly address! I’ll have to see if I can change this to a more user-friendly address.