Here's the latest top 15 from the Wikio rankings, which work by links between sites registered with Wikio, rather than traffic levels. Judging by one or two of these, they need to add 'Unbelief' into the category title:
1. The Freethinker
2. eChurch Blog
3. Islam in Europe
4. Phil's Treehouse
5. Thinking Anglicans
6. Anglican Mainstream (not a blog, it's a news aggregator)
8. The BIGBible Project
9. Of Course I Could be Wrong
10. Nick Baines
11. Bishop Alan
13. The Beaker Folk of Husborne Crawley
14. Lesleys Blog
15. Peter Saunders - Christian Medical Comment.
The top blog here is 209 in the general rankings. As you can only be included in one category, there's no sign of Cranmer (36) in this list, otherwise that would be far and away the top ranking Religion blog.
For those interested in life outside the ghetto, the top 3 blogs overall are Liberal Conspiracy, Left Foot Forwards (politics) and Sticky Fingers (parenting).