I've recently indexed my site with Technorati. I'm not sure if it'll attract any more readership to my site, but at the very least, it'll function as a social networking tool that'll list my site among sites thematically similar to mine, and it'll also allow me to easily find other similar sites.

I've got a few friends with blogs out there - some are listed on my side navigation, and some aren't. I'll see about getting them all indexed through Technorati as well, and since we'll all probably reference each other, it'll increase our perceived web presence. Fun.