I'm definitely interested in what you guys think of the, I'm currently using wasabi's, but I'm noticing it's giving posts that have nothing to do with the current post other than the fact that I wrote it. But then I write 98% of the posts on my blog so this is getting pretty useless.
One thing I'm noticing about Semiologic's plugins is that there's little to no documentation, which makes me hesitant to use them. Sorry, Semiologic, but with as many plugins as you write I'd really expect the documentation to be better.
UPDATE: At first glance Semilogic's plugin gives a little better results, although I am seeing a few posts that I can't tell at first glance how they're related.