Forum OpenACS Development: Re: RFC: "OpenACS bi-weekly Newsletter".
Post news to openacs.org/news as well when you publish it. It might need to be approved, or you might need to get granted permission, but we'll figure that out. Just ping me.
Also, you might want to take a look at other open source projects' newsletters for inspiration. I know that Mono has one. I'm sure others do as well.
Go for it. Great with all the initative, Frank! :)