Love the site. Really great work with it. I had an idea for a similar site, but instead it would essentially be like Pinterest in which you indicate your interests/hobbies and it shows you forums related to those. There's dozens of small forums that I discovered off the 2nd/3rd/4th page of Google results that are super helpful - but hard to find.

How did you go about finding the ~3000 forums? That's my main hurdle with the idea.