Who reads your blog?
James Green is wondering how to tell if no-one reads your blog. I'm not sure the answer is to use feedburner, because that doesn't account for people who read your blog through other aggregators.
I don't think the answer is to only publish excerpts. That only works to annoy people who read blogs when they're offline (like me!)
But perhaps the best way of doing it is to encourage comments on your blog. Do you read my blog? Don't answer 'no', please... I won't believe you.