Maybe the best way to make money in Web 2.0 is to write about Web 2.0? TechCrunch has been covering Web 2.0 since the beginning and now the site is the definitive guide into what’s up in the world of tech startups. On a recent Gillmor Gang, Jason Calacanis was talking about the profitability of TechCrunch’s new job listing service: CrunchBoard.

This got me wondering exactly what kind of money TechCrunch makes from this. As of today there 133 jobs posted. This means since its launch, CrunchBoard has made: $26,600 (133 * $200). Assume, the site can bring in $25,000 a month for the next year and that means the annual revenue of CrunchBoard will be: $300,000. You can also project revenue by looking at job posts per day. Right now, Cruchboard is averaging about 7 new jobs posts a day. At that rate, they would make over $500,000 per year. If they get 5 new posts a day, they are making a $1000 per day, which would be $365,000 per year.

The site has been up for less than a month so it’s hard to say if it will grow in popularity or decline as the newness wears off. Your guess is as good as mine. What I do know, is that Crunchboard is one profitable job site. We all know it doesn’t take much to run a job board. which means the margin has to be very high.

I am not saying this is the next Google by any means but still a very nice business…