www.prayerletters.com is a prayer letter sending service. You upload your newsletter and mailing list, choose the options for your letters and they take care of the rest for you! They check your layout, print it, stuff the envelopes, and put it in the mail within two weekdays.
What could be easier than that?
Their goal is to help you concentrate on staying engaged in ministry, and allowing them to help you by handling the mechanics of keeping your supporters informed and mobilized for prayer.