Very low ones, the first one is selling a set of shutterstock pictures, aprox 100 bucks a month. And the lowest one, 30-40 bucks a month with adsense clicks. Basically a list of powerpoint presenations (chain letters) for the spanish speaking. I spend 30 min a week. I get the PPS files, convert a couple of them to html and put them on a wordpress blog. edit: forgot to put a url http://powerpointz.com