If the software fairy didn't endow you with fancy-smancy software for creating library newsletters, you might want to try LetterPop, a web application complete with templates and drag and drop elements to help you make a fast and easy email, web or print newsletter. I haven't tried this, so if you do, report back to all of us.
[Spotted on LifeHacker]
I went to letterpop. The site presents 21 templates and they are pretty much all geared towards family or small businesses. It would be good if we could have components of the template to choose, rather than complete.