I’ve just submitted this blog to be considered for the new WordAds for WordPress.com blogs.
We’ve resisted advertising so far because most of it we had seen wasn’t terribly tasteful, and it seemed like Google’s AdSense was the state-of-the-art, which was sad. You pour a lot of time and effort into your blog and you deserve better than AdSense.
My blog may get too little traffic or not be focused enough to easily pair the content up with appropriate ads (or the reviewers (hello there!) may simply not appreciate my post about the bad ads on WordPress.com), but I have my fingers crossed.
If you run a WP.com blog with a custom domain, you can apply for WordAds too.