Did you notice an increase in your RSS count? This may have some contribution to do with FeedBurner adding FriendFeed to their RSS count. So if you’ve 200 people subscribed to you on FriendFeed, and you've added your blog as a service on FriendFeed, now you can see those subscribers right alongside the subscriber counts from Google Reader, Bloglines, My Yahoo, and anyone else subscribed to your blog's feed. When you add your blog as a service on FriendFeed, you're putting your words in front of a lot more people.