I started Pharmacy Researcher Forum a year back. It caters to the health niche with a special emphasis on diabetes, cholesterol and sexual health with added interest in anti-smoking and hairloss topics.
It's not a niche that will get hobbyists and will probably struggle to get members up quickly. But I like the quality of traffic more than the quantity and I will keep this up
looks like it has some good discussion going on. Not a huge fan of the design but I do like that you easily can see featured discussions. I also like how your online members is set to show for the last 12 hours of activity. Nice site one of the best I've seen that's been up a year or less