I've thought of it - I have alot of experience setting up websites for various organisation so I could technically pull it off. the problem is that I wouldn't know what market to go for. Obviously there are already well established forums, lot's of general information sites that have content collected from years of operation and pretty much anything else you can think of.
Any new website should either be a small ish fan site - just set-up for your own satisfaction or offer some completely unique service. If you think of something for the latter, let me know!!!!