Hi. Stack Exchange is a designed to be more interactive - sort of like a collaborative FAQ. Yes, the proposal was unsuccessful because of an existing proposal in the retro category already. But an independent site is on the way.
Are you implementing your own StackExchange?
BTW It would be nice to have a StackExchange for Amiga related questions, however with the recent copyright problems for uploaded examples I rather not add another ownership issue to the Amiga history :-)