Something I've been wondering about -- and I don't think you've addressed before -- is at what point a weblog should be mentioned in a query letter to agents. A few weeks ago, you suggested that it would require a pretty large regular audience to impact the money offered to an author, but might a more moderate audience still help sell the book? For instance, 1000 or so visitors a day instead of 30,000. Is that something you would care about as an agent, or would it just sound desperate in a query?
Wild ass claims make you sound desperate, not the fact that you blog. ("My blog has 1000 eager readers all waiting with bated breath for my fabu novel").
You might want to make sure your blog isn't just majorly sucky before you start directing agents to it as well.
I read Sarah Weinman's blog religiously. One of the things I notice is that published writers I know are reading it and commenting on it too.
I read Maud Newton religiously. One of the things I notice is that her blog isn't just about her..she's a fully developed, and interesting person.
I read Rake's Progress religiously. He's as funny as they come. Victor Gischler is too (get the link from Sarah's blogroll, you have to earn this one).
If you're going to use your blog as part of your presentation portfolio, it's going to have to be more than just ranting about your bellybutton lint problems (which is not directed at this snarkling personally since it's an anon question with no attached blog so quit gasping and reaching for your poison pen to write snarkly comments).