BusinessWeek have an interesting article on how top bloggers earn money and there are many known figures on the list from BoingBoing, ShoeMoney, Kottke, TechCrunch, Mashable, Problogger... others that I don't know at all, but probably you'll recognize some of them. But what I find interesting on this article is not the "how" top bloggers earn but the "how much".

Many bloggers I estimated they earn much more than the numbers announced, such Problogger ($100.000 a year) and this is probably due to the nature of topics Darren is used to blog about on problogger beside his photography blogs, which I bet provides the highest revenue for him. I don't think this is the real list of top bloggers on earning, since many don't reveal their real revenue. $5.000 per month is a good revenue, but not that high ! But you will notice how all of them used to vary their revenue sources.

From cat pictures and celebrity gossip to tech news and politics, the stars of the blogosphere earn plenty of dough, regardless of subject. Some bloggers start their sites intending to make big profits. But most of the bloggers we talked to had more modest expectations, and saw their blogs unexpectedly turn into businesses as traffic picked up and ad dollars rolled in.