When I did my report on places to submit pheeds: I probably mentioned that it works better for Technorati for submitting your pheed if you sign up if you want to be noticed, which I did.

What I did not notice at the time (if it existed then) is that after you have signed up you need to "claim" your blog. Once you claim your blog you can add all sorts of tags that relate to your blog, including a tag that is the name of your blog.

This makes your blog a lot more prominent. Of course it helps if you put tags in you blog posts too.

I have been experimenting with this and although I have not seen any great increase in traffic yet, I sure am a lot more prominent in Technorati for my test site.

One other point: You want a variety of tags, some topical, some less so. The tag listings get bumped by new tags. If you update your tags and posts frequently you will always be popping up in the current listings, but you will be regularly replaced by newer posts. If you choose a few tags that are not updated often in technorati the link from them to your site will stay on the first page or near the top of the listings a lot longer.

Castle