My surgical reconstitution of MTBlogMail as WPBlogMail (bottom-up rewrite to take advantage of WP APIs and to run leaner, cleaner) has been humming along happily for a couple of weeks now, so I’m calling it stable. Just added the script to the WordPress Plugin Database.
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There’s no way that the plugin uses the mail adresses from the registered users?
David, that’s not a bad idea. In fact, that option is already in the sister script, MTBlogMail (for Movable Type). I’ll plan to make this an option in the future.
I think one of the reasons this feature never was used much in MTBlogMail is that you have no guarantee that users who register on your blog also want to subscribe to emails. They’re different sets of users. So the external mailing list makes a lot of sense.