I went to the AMIP course at USAFSAM recently, and it was the FIRST course I actually enjoyed taking in the AF (well, maybe I liked AMP 202 - The Flying Part). An nice benefit is that it prepares you for all of the EET BS during MAREs and other military concoctions designed to ruin FS life and shatter any sense of clinic normalcy -- as if CBTs, formations, all-calls, wing runs, etc etc etc didn't already do an effective job already!
That said, the actual SIB would be a great deal of work to say the least. I'm told I'm on a "list" now that is fully spun-up to go on a mishap investigation.
I have been involved in ISBs before. Took up a weekend, but it was actually a pretty novel and interesting experience.
Oh and someone mentioned an AIB. Is there a FS on the AIB as well? I have only been fully briefed on what part I'd play in the safety investigation...