No it's not a taboo subject, but here's the deal. Unlike arcade manufacturers, console makers are very protective of thier games. Nintendo and sony being the most adiment, will sue a site for having a VERY old game on their site, much less the newer ones. Sega does this too, but to a lesser degree. So basically what I'm saying is your more likely to be shutdown for having a site of snes roms then you are having a site of the complete mame set.
I'm not saying that they aren't out there, but considering the danger of making them too public, you need to find them yourself.