Have you guys ever heard of the Let's Play community? They're basically a bunch of guys on video network sites like YouTube, Dailymotion, etc. that make video commentaries as they play video games.
It all started at Something Awful (here's a collection of their LPs) and it eventually expanded to the smaller denizens of the Internet who didn't feel like paying to join that forum, so they started a free forum of their own called...well...the Let's Play Forum.
I'm a member of that forum and an LPer myself. If anyone would like to send me their hacks, I'll gladly play them.
By the way, Xakep: Brutal Mario may be hard, but I've seen harder hacks. The most famous hack among the LP community is Kaizo Mario World.
of how cruel some rom hackers can be. Click here if you want to experience the pain yourself. :)