I have created a Christian Blogosphere network at Feedburner. It's open to all Christians whether they are on the blogroll or not. You do have to agree to the same profession of faith as required of those who join the blogroll.
Here is a synopsis of Feedburner Networks:
FeedBurner has launched a new service to give its publishers the ability to organize themselves into networks, groups of folks who publish similar content and want band together to leverage the power of many to cross-promote their content and get more attention.Email me your url or leave a comment with your email address and url and I will mail you an invitation.
Christian Blogosphere is a network comprised of feeds with content similar to mine. By accepting my invitation, you'll be associated with this network and will have access to some promotional tools to help us increase traffic and "discoverability" using network badges, chicklets and BuzzBoost, which promotes the top posts from the feeds in our network.
I need the email address because I can't send the invitation without it.