Instead of applying Technorati tags (so my posts are indexed - unless Technorati can automatically index the categories in my blog) to each post on my blog I am saving each post in a del.icio.us account and applying the same tags as the categories used on my blog. This way I have a back up of all my posts and Technorati will index them (although my results will be presented under the del.icio.us heading instead of the more appropriate blog heading in the Technorati tag search page.
Also my blog can be searched via my del.icio.us account by combining categories, something my blog’s native search facility doesn’t offer.
Another added bonus is that I virtually have double the content floating round (which is a bit cheeky), and anything posted in the del.icio.us social circle will increase my visibility.
…now that you have an RSS feed for your categories in your blog (via del.icio.us) you can also add an RSS feed button next to each of your categories, this way someone can read only what they are interested in.