By far the most prolific Biblioblogger would have to be Jim West. Google Reader lists his posting average at almost 50 posts per week. No one else comes close.
The most authoritative Biblioblogger, if you give Technorati authority ratings any weight, is Ben Witherington with 520. Jim West was a close second with
The most intellectual Bible blog is Ancient Hebrew Poetry. I confirmed this by running the "Blog Readability Test" on several representative biblioblogs. John's blog ranked a Genius reading level. Now this doesn't mean he's the most intelligent blogger. In my subjective opinion, I was debating between him and Charles Halton from Awilum (both very intelligent guys), but Charles's reading level was only Elementary School. I also checked Jim West (Junior High), Chrisendom (High School), and Bible and Ancient Near East (College).
The most humorous bibleblog is unquestionably Scotteriology. Scott Bailey perfectly balances insightful commentary on theological issues with a clear talent for humor writing. If you don't believe me, check out his post about ascending to the fourth heaven.
This is just a sample of my favorite blogs. They come to mind because they post fairly frequently. Feel free to sample others in my blogrolls after you've started with these. I haven't read everything everyone's written, but I've read enough to trust that they usually have solid content that's worth reading. I won't knowingly throw any "crackpots" on the blogroll. Even if I don't agree with all of them, their arguments are usually thoughtful and worth interacting with.
I'd love to follow up this post with a "Worst Bible Blogs" list and link to some of the crazies for you, but I really don't feel like drawing their attention. They tend to avoid using reason and take it personally when they're told that they're wrong.