I was reading a blog post by Anne Whitaker (To the website! Chapter Three (at last!)) and came across these showcasing sites.
I’d heard of Technorati before, but hadn’t ever looked into it. I’m not sure that I’m all that interested in going out of my way to share my writing with the world. Anyone who is interested in what I write about will probably (ignoring a recent exception) be able to find my blog posts just by doing a websearch. But I could possibly enjoy a bit more interactivity than I get in my isolated blog world. I was observing how very few of the people who visit my blog ever leave a comment… maybe one out of every few hundred visitors. Half of the people who comment simply do so because I linked to their blog first. So, I’ll explore these sites and see what I think of them.
Marmalade 
I like http://www.querytracker.net – it’s a good tool and there are lots of resources. I haven’t found an agent through them (yet) but I have only sent out perhaps 20 letters…
There are many sites that offer different kinds of services. I’ve looked at some of them off and on, but for my purposes I haven’t found too much that interests me. Blog Carnival does send some traffic to my blog, but at the moment I’m exploring Blog Catalog.
I’m not entirely sure what’s motivating my search other than mild curiosity. It’s always nice, though, to find other bloggers who have similar interests.
Good luck with finding an agent! I’ve been told persistance is important, but what do I know. 🙂