I'm sure I've seen this before(I think I discovered it a couple of years ago, bookmarked it, PC died, and I forgot about this easter egg).
I've messed around with it a bit. Pretty fun, although I couldn't find any easter eggs outside what the help shows(I tried a bunch of stuff such as prefixing a command with "sudo"(I apologise if this is a bad thing to do; I assumed it would do something silly/funny), several JJ2 cheatcodes, a couple of random JJ2 general things).

One question: Is it possible to browse the forums using this, or can it only do some silly J2O-related things?

EDIT: Bug report. The clock is one minute behind.