For those who are interested, I installed the Chrome extension for Zemanta earlier today and have been working with it all afternoon.
I find it easy to install and use. I can see why people would like it.
However, when it provides related links from my blog, it only seems to pull from what's been published in the last month. I've been writing a blog a day for over three years so I'd rather see the search cover the entire body of work with the idea of pulling the most closely related posts, not necessarily the most recent.
I am going to give Zemanta some more time before uninstalling it. It may be that it needs a few days to fully index a blog's contents. I can see, however, that their general bias would be toward the freshest content so I'm not expecting to see a change.
As blogs mature and bloggers archive more and more of their own content, they are going to appreciate a "Related Posts" function that searches deep within their own blogs. Memory alone is not going to help when you're over a thousand posts. And manual searches with cutting and pasting links is just too tedious.
Thanks for listening.