WordPress MU

I've been searching to see if there is a plugin, but I can't seem to find what I am looking for.

I need a way to send an e-mail to all of the blog administrators. When I add new features, I want to be able to let them know and give them instructions on how to use the features.

I'll keep looking.

http://mu.wordpress.org/forums/topic/9049

This method I use will add a page to the SiteAdmin menu with a gigantic list of emails you can paste into your favorite mail program.

Thanks. That's definitely helpful.