It's an interesting thread and I am sure some inquiring minds do want to know (and others could care less and that is fine)
For the ones that do care, there is some good and accurate information already posted in this thread. I can also add that:
Joe Tucker plays with an OB shaft
Charlie Bryant plays with an OB shaft
Allison Fisher plays and breaks with OB Cues with OB shafts
Phil Burford Plays and breaks with OB Cues with OB shafts
Hope that helps. It will be fun to see the list grow but it will require some work to keep it current and accurate. If you email some cuemakers they may be able to let you know the names of certain players and the equipment that they use (if it's their product)
I miss being able to shoot and break with my playing cue. Can the OB Pro withstand the abuse of breaking?