BoyChan.org describes itself as the 'best gay image board where anyone can share pictures and write comments'. If you know what an image board is, I can say with confidence that this is a pretty damn good place to get your hands on the material you desire. As things currently stand, Boy Chan has 4 sub-boards: boys, gay porn, bisexual and requests. Note that BoyChan.org has a very strict rule on not posting anyone under the age of 18 and that for the 'boys' section, you're just looking at sexy twinks and dudes that look pretty damn youthful.
There aren't too many posts here on Boy Chan, but that's something that can obviously change as more and more people find out about it. As far as I know, there aren't too many image sites out there that are devoted to gay entertainment anyway. What does this mean? Well, if you want an image board that is 100% gay, this is the place to go.