I believe that would be superior DB design because not only do you have a unique PK for each identifying row, it is unique across the DB. Maybe that is 4 or 5 NF...I never read much past 3 :-) I only wish identifying columns would autoincrement the "master counter" so it was automated like MS SQL. A combination of the two if you will. That may present a locking issue...but I am sure they thought of that.

Thanks for the great response.