Our site is getting about 200 visitors a day. We launched about 2 weeks ago and are still in beta, but we'd like to start increasing our user base just to get more feedback. In my past ventures, getting customers was one of the hardest things to do.
Being a programmer, the actual work was hard but at least you knew how to accomplish the task.
Have you seen this site? It appears to be a pretty cool way to see if your concept actually makes sense to other people. It'll be nice when they finally launch.
I'm running into the same issues with my site, http://joind.me
We're trying to find ways to make it useful for the majority of people.