White Collar Crime Prof Blog has a 6.1 "Blog Juice Rating," determined by:

• Number of Bloglines subscribers (40%)
• Alexa rank (15%)
• Technorati ranking (30%)
• Number of inbound links via Technorati (15%)

Here are the Blog Juice Ratings for various law professor blogs:

(esp) (chart supplied by Professor Paul Caron – Tax Prof Blog – here)