Every day, I discover a new directory and tagging site for my blog - it is a great idea to synch up with as many as you can to get maximum marketing exposure!
Rawsugar (www.rawsugar.com) is getting more and more popular, and will automatically update its directory with your content if you simply submit your feed URL.
There is a "Pimp My Blog" link that allows you to cut and paste a search function and more into your blog as well.
You can import all your Delicious.com tags into Rawsugar, and their search function allows visitors to your site to search YOUR content by tag. This can be VERY useful, and will certainly make your blog site more user friendly.
I suggest checking this one out - I just added all my feeds to it.
technorati tags: rawsugar, blog navigation, blog search, blog publicity, marketing, blogging, blogs, raw sugar
del.icio.us tags: rawsugar, blog navigation, blog search, blog publicity, marketing, blogging, blogs, raw sugar
icerocket tags: rawsugar, blog navigation, blog search, blog publicity, marketing, blogging, blogs, raw sugar