WP-Deadbolt 3.0 is an updated version of my older WP-Deadbolt, a plugin designed for WordPress that allows blog owners to have more control over the e-mail addresses that are used during the registration process.
You can now choose between whitelisting and blacklisting and it's completely configurable via the administration area.
More info and download link:
http://www.village-idiot.org/archives/2007/04/24/wp-deadbolt-3/
I am going to experiment with this on my WPMU blogs. It would definitely be needed there.
Thanks!
Has this been tested to see if it works with WPMU? (If not, consider me your WPMU beta tester!) :)
I have put together a blacklist updater that will add 830 of the spammiest domains to wp-deadbolt 3.0's blacklist.
Its a single file that executes all the necessary SQL.
You can grab it here:
http://www.village-idiot.org/archives/2008/03/03/wp-deadbolt-blacklist-update/