One of the things I need to do is keep track of stuff that's happening around me. So last week when there was so much action in Paris, I was particularly keen to track the response to the podcast I did.
Here's what I know (as of today):
Something around 250 people looked at the article
39 people downloaded the podcast (update: 42)
It was referred to 30 times by other blog aggregators (BTW - you should see the comments about this form of attention tracking at Ross Mayfield's site - talk about lightning feedback)
I reckon the 'value to reader rate' (VRR - hey I've invented a TLA!) is something around 10-12%. No advertising. No marketing. Not a penny in cost other than my time to create the postings and podcast. Don't forget, I'm only after a very tiny fraction of those that make up the blogosphere. Those that want to be innovative.
On that basis, I reckon I've hit a fair proportion of those I'd like. So now I'm seriously marketable. Because guess what? Folk that listened to the podcast told me what they thought - and it was all positive.