Zemanta is a nice little WordPress plugin which allows you to discover tags and linkable items within your content as well as images to include. In short it could have a nice little blogger's elf, helping you to create richer content. However it fails in several ways, the most prominent of which is its aggresive backlinking policy.

Everytime you use its help, it will insert a link-back to its own site. However that's not all. Many times I have deleted the backlinks and found them to have mysteriously back again on saving! I don't mind backlinking but backlinking them on every post is a bit too much. Also they shouldn't relink when I have intentionally deleted them.
BTW: What does Google search have  to say about this?

Secondly their image help is often not context sensitive. In fact searching images.google.com would have yeilded much better better results.

Thirdly I don't like their policy of linking to Wikipedia. I don't have that much Wikipedia love in me nor do I think them to be authoritative. I would rather have them link to the actual site.

The only saving grace is that their tags are somewhat relevant. I said "somewhat". As I am writing their suggested tags for this article includes wikipedia (before I wrote this). What's it with their unholy love-fest with Wikipedia?

I have decided to stop using Zemanta. Thanks, but no thanks.