It's actually a small online tool for reading some kind of information. Three days ago when i published the site, one forum (>17000 members) put my site on the top and they'll probably do it for at least a few months. Some users also seems to learn about my site from blogs and twitters.
The dilemma to me is that many users seem to hate advertising. If it doesn't generate good amount of money i won't bother to annoy my users. So far, the cost of my website is only $20 per year (including the domain) and if the hosting company doesn't complain my bandwidth usage, my operation cost can be very cheap forever.