The megathread is separate from Reddit as it's hosted on Github, using gitpages. Also there should be links to the megathread on the side bar. Alternatively you could just search megathread on google. In America at least, it's the first result.
I can do moderation here, just like /r/roms.
I'm still alive as a mod of /c/[email protected] I've been quite busy with /r/roms on Reddit though so I rarely get the time to come over here.