That is the coolest thing I have seen in quite a while.
Seriously, I don't think that many people can come up with something as clever as HPMOR. To start with, it's clever in itself, and isn't simply an amusing reference that only people who know what Eliezer and Luke look like would get.
That said, go for it. It surely would be fun to make, and probably at least vaguely fun to read.
People have been asking this question here a lot lately (not sure, why, but still). MoR has been by far the most effective ad for LW so far, but this is a one-man effort. I wonder if a web comic drawn by the regulars based on, say, recent posts and comments would be another way to get people interested. Just to set the bar really, really low, here is my quick impression of this post (the idea is stolen from #lesswrong, but the obvious bad pun is mine):