My banding date is 5/5/08 also.
I did my pre-op admission meeting with the hospital staff yesterday and they said no hair products, no leave-in conditioner, gel, no deodorant, no nothing on my body.
The reason they said was that the petroleum and alcohol in a lot of those products were "spark" hazards. Not sure exactly what could "spark", but I guess since it's laproscopic, the electronics in the equipment that they use could be it.
Sort of like smoking a cigarette while you're pumping gas...