Plugin for New Posts and New Comments E-mail Notifications

We recently received a request from one of our blog owners.

They currently use a blog in our WordPress MU directory for their team and want the blog to send e-mail notifications to all the users of the blog when new posts and new comments are created. I've found plug-ins that do one or the other, but I was wondering if anyone knows of a plug-in that does both?

If not, what would everyone recommend to accomplish this even if two plug-ins are required?