In my second and third year, one thing that worked for me as far as generating interest, and business, was writing more about what others were writing. The key became a blockquote and a link to the writers blog post or a news story on a news website. Bloggers knew I wrote about them right away via their RSS feeds tracking their name/url or referral logs. For reporters it may have taken an email from me.
The outcome was more people subscribed to my blog and more people wrote about my content. The more people who wrote about my posts the more people that saw my blog and then subscribed.
Also realized during this time that some of the best blogs sent people away. The more valuable things I found and directed people to via a blockquote, a comment, and a link, the more people that found my blog of value. The more value I provided, the more they returned.