From the Technorati FAQs What is Authority (http://support.technorati.com/faq/topic/71?replies=1)
[...] Technorati Authority is the number of blogs linking to a website in the last six months. The higher the number, the more Technorati Authority the blog has. [...]
Technorati Rank is calculated based on how far you are from the top. The blog with the hightest Technorati Authority is the #1 ranked blog. The smaller your Technorati Rank, the closer you are to the top. [...]
Re: grrr....
What is Authority (http://support.technorati.com/faq/topic/71?replies=1)