Since I am one of those copyright freaks, I can't partake in MAME. Maybe I will find $3,700 laying around one day so I can buy the Arcade Legends Full Size Game System. 35 vintage games in one nice package.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.