I've spent the last couple hours looking for quality online mission content that is regularly updated and have largely pulled a big goose egg. I've know about PFF and The Outreach Foundation, but really wanted to extend beyond them.
After all that time, I gave up and called Dad (Don Dawson). Here are some sites he suggested. Unfortunately, none of them appear to utilize syndication, but I'm working on ways to notify people of updates to these sites and more.