I have to admit, I love newsletters. As a "traditional" communication medium, you could do far worse. One of the problems with traditional newsletters though is that they're sent out in the format I need to send them in, regardless of what my customer wants. That just changed with a new Web 2.0 technology called FeedBlitz. With a recent announcement they are turning up the heat by claiming to not only send my newsletter via email but they also enable delivery via Skype, AIM, Twitter, RSS - and my favorite, an audio podcast!
This service has only been out a week so I can't give it a personal endorsement yet but I'm working on changing that. If you have a chance to try it please let me know what you think.