Slice FiveNinjas original forum dead?

I can ask, but I don't recall seeing a lot of particularly useful info there that's not already duplicated between general technical info on the Compute Module (on the Pi Foundation site) and posts here.

AFAIK the business was mothballed and eventually the assets (the intellectual property) of FiveNinja's were sold so nobody really has interest in running a defunct forum these days. If you have questions post them in the subsection here and someone will probably answer.