dys, that horrible! I'm sorry that happened to you.
Definetly talk to his doctor to make sure there aren't any physical problems contributing to his bedwetting.
My son had some.... errrr.... upheavels.... during his early life that led to periodic bedwetting so really
be honest with yourself (and his doctor) about any stress or problems he might be having.
One thing that really helped us was switching to diapers that weren't so super absorbant so that he would feel when he was wet. Cloth diapers are great for that.
I know it can be really frustrating but dys is right -- how you handle it is really important. Long term important.